Will I have issues loading Win 7 onto new PC with Win 10?

1. Yes you can install Windows 7 onto a new PC
2. Yes, you will be asked for the product registration
3. Yes, you can still purchase Windows 7 software.
Now - the rest of the story - -
If you have a windows 7 installation disk, you will need to know if it includes Service Pack 1. If not, you will want to download and save SP1 to a disk BEFORE you install Win7. The reason being is that without SP1, Win7 may not find all of the drivers needed to make your new PC work properly (Including your network drivers).
Secondly, go to your PC manufacturers site and see if they list Windows 7 as a choice for an OS for your machine - if so, locate & download the network, sound, and video drivers - again BEFORE you install Win7.
Thirdly - make sure you have product codes for all installed software (ie: Office, any graphics software, etc. etc. ect) as well as installation media saved to a disk, as to install Win7 you need to do a clean install, which will erase the entire HD, including all software, etc. Your PC manufacturer MAY be able to provide you with a "factory install disk" that includes most of the software your PC came with - but you will still need to pay for Win7 (UNLESS your pc came with a "free downgrade" option - some older "new" ones did).
Finally - give Win10 a try before downgrading to win7 - but FIRST - make sure you have installed the latest upgrades - ie: Fall Creator's Upgrade, and then run updates to make sure you have "the latest". You might find that with a small learning curve, you will actually find Win10 easier to use, and better, too. I have.

I had windows 10 up for about a month and am now quite happily back at 7!! I saw absolutely no benefit to me from W10 - and some losses - so the cost/benefit ratio didn't make it!

Anyhow - sorry you lost the reg info but you can buy a new one for under $20. I've recently installed w& on several PCs this way.

Just know - you will have ORIGINAL W7 all over again and will have a couple hundred updates waiting - so just let that happen and wait out the couple of hours.

It DOES work!

I have a machine that runs Win 10 in a dual boot environment with Linux Mint 18.3. I have another machine that runs win10 on a machine that I do my taxes on, it remains unplugged for 11 months a year. I have two iMacs running OSX 10.11 and 10.13.

I started using computers in the 80's, my first machine (286 with 1 mb and then 4mb ram) ran DOS 3.3, it never gave me any trouble for the 6 years I owned it. that machine was replaced by a 486-33 so I could rn a CAD program, it ran Dos 5 (and eventually DOS 6) and that machine never gave me a problem for the 8 years I had it.

In 2001 I built a AMD dual processor machine that ran Win2000, that was a very fast machine that I use to this day but now runs Mint 18.3. I bought a used but newer machine and ran WinXP on it - hated that OS. When they dumped Win 8 on us I bought a iMac and that is the machine I'm typing this on.

When I retired in 2009 I bought a used HP laptop with Win7 on it, I thought that a decent OS but not as user friendly as win2000. That laptop died and I bough a laptop with Win 10 on it and I absolutely detest that OS - it was designed for morons and took away most of the tools you need to get work done without being pestered by Microsoft induced stupidity.I Installed Linux Mint on that machine and it works MUCH better now.

Unless you need a program that needs Microsoft (like my tax program) I would take a serious look At Linux Mint. It looks a lot like Win2000/7 but almost never pesters you with stupid notifications. You download updates on your schedule not Redmonds and they take very little time to install unlike Windows 10 which yied up my machine for TWO HOURS last weem whe it forced updates on me.

i REFUSE TO SUBMIT MYSELF TO MICROSOFT'S WHIM ANYMORE.

I have four desktop and one laptop and they are all running windows 7. I hate windows 8 and 10. I already have a phone and a video game. I need a computer. Yes, you can install Win 7. However, you must have the correct version of the disk and the registration key. The disk that came with an old computer won't work. You must have the "retail" version of the operation system. The registration key should be on a yellow sticker on the disk folder or inside the disk case. If you don't have it, the disk won't work.
However, a short trip to Ebay shows many sellers of Win 7 disks for under $30. Pretty cheap for an OS that cost $400 in it's prime. (Don't buy the "OEM" version.) Good luck!

You didn't specify which version of Windows 10 You got on the new PC, and that could be quiet important..

You see on the Windows 10 Professionel You can enable 'Hyper-V' (that is if the new PC has hardware that support this, most new PC has hardware that do) then You can simply create a Virtual Machine in which You can install Windows 7 on.

If Your old PC stil can boot up, then You only need to use the free program 'Magic Jelly Bean' to get the serial key / Licens number.

If that works out and You get the old serial number, then go to the Microsoft webpage:

https://www.microsoft.com/en-us/software-download/windows7

Here You can create either a Windows 7 Boot Disc, or downliod an ISO file or make an USB stick into a installation device with Windows 7 Home on.

Then in the Hyper-V manager create a new virtual PC and chose that You want to create a Windows 7 virtual PC.

Find a Youtube video where You can see this been done, there are hundreds of tutrials on this subject.

You wil then be able to install all Your old program's from Your Windows 7 Home edition.
You don't even need to start windows 7 up to run these 'older programs' they'll show up under the list of installed programs on Your new Windows 10 and can by started directly from the Windows 10 user interface..

IF You manage to get this working then You will be able to slowly learn how to use Windows 10 and still be able to either just use Your windows 7 programs or even have the full Windows 7 experience running as a virtual machine...

Q E.D.


..

Was hoping someone would address how to put all files (lots) currently on win 7 home onto a new computer with win 10?

You will need a drive wiper on a flash drive and the OS Disk with the character key. Wipe the drive and restart with the disk in your drive, then you will have to configure the OS from scratch. If you like WMC just that alone is worth the expenditure for the two remaining years. I have Win 7 Ult. on my own build that I got the free upgrade to Win 10 Pro. It wasn't not being able to understand Win 10, it's actually easier to me. It's that what they are offering in the upgrade didn't do it for me. So I reinstalled Win 7 Ult. $120 verses over $400 for a WMC alternative! I don't like the apps and most have to be bought. Some you have no option to get rid of either. Mayhap by the dead line MS will realize that they are getting rid of some of the baby with the dirty bath water.

You may end up wasting a lot of time unless you go the route of those very experienced people who can add second hard drives or partitions. Dell and Microsoft will probably not be any help. I bought a Dell 3252 desktop with W7Pro installed and it came with a W10Pro disk. I figured it would run both. Dell has W7 and W10 downloads for this computer on their support website so you would think Dell would know. After 6 months and after a W7 update, W7 stopped working. I spent 100's of hours and over a month on the phone and having Dell control my computer trying to solve the problem. W7Pro was re-installed many times. I was told to call Microsoft and Microsoft said Dell was responsible for the W7 they install. The case was escalated to higher level of Dell technical support. Finally Dell told me the computer was designed for W10 and the installation of W7 was just for the convenience to get me started. The computer is running fine on W10 and I am getting use to it. Nobody knew why W7 would no longer run.
I would follow the advise to learn W10 and make the suggested changes to the Desktop that make it useful to you.

I'm not being rude. I'm being accurate.

The only people who would have problems "learning to use" a new operating system would be those who be making use of the operating system.

It's sort of like the difference between driving a car and working on a car.

With a few inconsequential differences, for most users, there will be no difference between the two operating systems; and if there is one, it would probably be perceived as being for the better -- that is, easier to use.

The differences that impact computer behavior are technical ones that operate behind the scenes and would matter to power-users, people who would be working under the hood, so to speak; and who would already know the answer to the question you ask.

In other words, by asking the question, you suggest that you aren't such a user, that you won't be working with the substructure of Windows, that you only want your own standard applications to run smoothly.

So what are the few exceptions that might affect you? If you have some cherished out-of-date software that just barely works on Windows 7, then you might have to make some adjustments when you try to install it on Windows 10. Some of the older MS Office suites won't run on Windows 10; but those are so out-of-date as to actually be potential malware magnets. The same caveat applies to most other older applications, too.

Of course, as with any new operating system, there were bugs at the beginning, though much less than anyone expected. By now, however, Windows 10 is probably safer and easier-on-the-user in almost any aspect.

I do, however, miss the power of the search engines and menu design from Windows 7. But the tradeoff is worth it.

Jane, You know that Windows 7 simply will not run at all with some of the newer Intel processors and chipsets? Why? Intel has not provided Windows 7 drivers for them. There are workarounds for this, but they require know-how well beyond the average to get the Windows 10 drivers working on Windows 7. I am assuming you do not have this know-how.

So...
1. Use Windows 10 as it is, and get used to its different look, feel and operation from Windows 7.
2. Use Windows 10, but download and install ClassicShell which more or less allows you to revert back to a Windows 7 style of desktop.

With ClassicShell, yes, you will still have to make some small adjustments, but Win 10 and ClassicShell are close enough that you can easily learn the differences.

You really should leave Windows 10.  Most people who "hate" Windows 10 (or 8.1) don't like the interface.

Install Classic Shell from classicshell.net.  It's free and you can choose any menu style you like, from Windows 98 (the one I use), through Windows 7.  All my PC's, both at home and work have Classic Shell. I have all of them set to the "Classic" (pre-XP) menu because I like that.  I normally can't tell the difference between the Win 10 PC's at home and the Win 7 PC at work.

We got a bunch of Win 10 PC's at work and immediately set them up with Classic Shell.  Most of the people using them have fairly basic computer skills and only Win 7 experience.  None of them have had problems switching, because the interface looks familiar.

If after you've used Classic Shell for about a week you still don't like Win 10, then yes, consider switching to Win 7.  But considering the Win 7 is 9 years old, you're really better off going with Microsoft's current product, even if it's not what you prefer.

In addition to Classic Shell, there is one other program you might want to install: Old Windows Calculator.  Download Old Windows Calculator

Dear Jane C. the answer to your main question is "NO", you can load windows 7 into your new computer BUT why do you want to complicate your life? If you have a windows 7 disk, I am assuming you have the serial number attached to it; so you COULD uninstall the Windows 10 on your new computer and install your Windows 7 operating system. You could even install the Windows 7 without uninstalling Windows 10 and then decide what Operating System to run when you switch on the computer.
This will imply some knowledge and in the end, it all make your experience with your new PC more complicated.
Windows 10 is not that different from Win 7, believe me. If you learned how to use windows 7 then you will be happy with windows 10 too. So, bottom line: leave your PC with Windows 10 as it is and you will be perfectly fine, and better off than Win 7.

Jane- Did your husband wipe the files or just hurt the operating System?
You can find out by installing the old HD into your new computer assuming the connections are the same ( SATA ). I am guessing the new machine will open with W10 and then the second HD will be seen as a disk with files in it- the ones you want to access. Begin there. If the W7 OS is still on that disk then you may be given a choice of which disk to boot from. Usually, though, that is done from the bios unless you have set things up to get a choice from the bios. Thus go with W10 and install that HD to see if there are still files to save. Later you can test to see if you can boot from the old HD. When you have seen all this and find you no longer have a working version of W7, you can get a copy of W7 and install it on a newly created partition on the old HD but know you will erase all files from that old HD so get everything you can from it first. Then later you have the option of which OS (and thus HD) to boot from. from.

If you like Windows 7, recommend that you purchase and install the Start10 Menu Button at stardock.com.
Start10 will change your menu to the familiar Windows 7 format.
Navigating Windows 10 using the Windows 7 menu will simplify the learning curve.
Try it ... you will like it.

On new Macs that come with latest macOS, that version was written to support that and somewhat older model’s hardware. The software for a five year old computer will not support the new CPU and video card and I/O ports. It is unlikely that it would allow you to install the old version in the first place. I don’t know if Windows installer checks first.

I have 2 desktop computers in my house, one is a Windows 7 machine from 2010 and the other is a Windows 10 machine from 2016! Both of them are high performance. Guess which one I use as my main computer? My Windows 10 HP Desktop with an i7 Processor, 24 gig of ram, and a 500 gig SSD. My W7 machine has is a Lenovo W7 Desktop also with a i7 Processor, 8 gig of ram (Max), and also a 500 gig SSD. Their speeds are almost the same. W10 for all its warts is head and shoulders ahead of W7. It should tell you something that the 2010 Lenovo came with W7, and it is going on 8 years old. W7 was a good operating system, but W10 is a newer one and uses newer Technology. W10 will be supported for many more years and W7 support will end in 2020 and it will likely become more unsecure in the years after 2020. Stick with W10, and you will be a lot happier in the years ahead. Most of the programs that worked with W7 will also work fine with W10. I brought along all my favorite W7 Programs that I have been using for years and they work just fine.

If it’s a true Microsoft Windows 7 disc bought from a retail store that didn’t come with a computer, it may be able to happen. If it’s a manufacturer labeled windows repair or reinstall disc then I wouldn’t even attempt it. Even a same brand can be an issue. Say your W7 disc was for a dell laptop xxx series. The new computer is a Dell. The W7 disc was made for certain computer models only. I feel your fear of W10. It sucks. I’ve had all windows for years. This one is the worst and most unreliable. The fact that it’s forced upon you to update in the background is terrible and makes the machine very unreliable. It will bypass any so called settings designed to do things when not in use and reboot in the middle of anything your doing and possibly loose work not saved. I have a couple in the home. Updates very often are corrupt, don’t install properly and even change drivers for basic machine functions so something like the display brightness or the keyboard no longer works... then you have to fix it. Waiting to afford all Macs. I’m done with Microsoft. Windows 8 is a better middle ground, still controls windows updates manually and can be still purchased in computers if you look.

If your new computer does not have either a combination PS/2 port for both a keyboard AND mouse OR a PS/2 port for each of them, alone, you can not install Windows 7 on it. Period. The End. The reason is that the newest processors do not support PS/2 devices within the USB circuitry. Therefore, you can not just plug in a PS/2 keyboard and/or mouse into a USB port and expect it to work.

I found this out the first of this year when I built a brand new desktop for a friend of mine. As I'm going to be helping him switch from Windows to Linux, I installed Window 7 on the computer for him to use while he's learning about Linux and then when Win 7 goes EOL, he will know how to use the Linux for online stuff and still have Win 7 to do what little may be needed for OFFline use. I picked a motherboard that has a combination PS/2 port. That said, this computer still acts just a little bit wonky at times while using the mouse.

Another thing is that, as others have touched on, if your copy of Windows 7 is an OEM copy that came with another computer, it is tied to that computer. IF you have the FULL installation disk for that, you can call Microsoft and explain to them that that computer no longer exists and that you would like to install that OS on your new computer with Win 10 in a dual boot configuration. You MIGHT be able to talk them into allowing you to do that. I did so last year when I built a computer for another friend who had a disk for an old computer that had its MOBO fry and, at that time, they allowed the installation of that Win 7 for that old fried computer to be installed on the new computer. Also, as stated, once Win 7 goes EOL you will NOT want to go on line with it at all. That is the job for your Win 10 or your Linux if you ever decide to mess with that in a triple boot configuration or even from live media.

In addition to which, as others have also stated, you have drivers to deal with for Win 7 to run your hardware with. You would have to go to the website of your new computer's manufacturer, and/or that of any other hardware peripheral that you have to see if you can find drivers for the hardware that you now have for that Win 7. They may or may not exist. If they do, you will have to be very careful as to the order that they are installed in. If installed in the wrong order, they may not work and may even toast your installation of Win 7 causing you to start all over again from scratch. That may, in turn, toast your installation of Win 10. I sincerely hope that you made your installation disks of your Win 10 before you even used the computer for anything at all!!!

If you are an advanced enough computer "administrator", you MIGHT be able to deal with everything that I've described for you. If not, then you do want to take the others' advice and just don't do it.