Sandy:
There are several ways to go about cleaning your computer, and some are more drastic than others. I'll go through the three I can think of (divided into sections), and start with my recommended course of action - reinstalling Windows.
SECTION 1: THE REINSTALL
First, save everything you would like to keep. This usually involves saving all of your documents, pictures, music, videos, et cetera onto portable media - CDs, DVDs, USB thumb drives, external hard drives, whatever. I listed the easy stuff, but think hard about what you want to keep, and there's probably a way to save it. Take your favorite websites for example. I use Firefox, so mine are saved in the folder "C:\Documents and Settings\Luke\Application Data\Mozilla\Profiles\default\jid3mzvk.slt" in the file named "bookmarks.html" and backed up in "bookmarks.html.sbsd.bak." That "jid3mzvk.slt" folder will probably be some other random name for you. That's just an example though, you might not want to save your favorites. If you're like me, your favorites tend to pile up and you stop visiting many of them. One last thing to check - if you don't have your Windows XP CD key, right-click on My Computer, go to Properties, and you should see it there. Be sure to write it down before moving on.
Second, stick in your Windows XP disk and install from scratch. This will erase everything you've got, so the first step is important! But it will be well worth it, wait until you see how quickly Windows will respond.
Third, start installing the good stuff! Windows comes very bare, which is nice for speed, but not so nice for usability. The very first thing I do is install Firefox, but the very next thing you should install is security software (I might argue that installing Firefox is a good first step in that process
). I suggest you visit www.filehippo.com for this. Note that you can download the older versions of every piece of software they have. Here are some options for you, and I'll highlight my choices, which may or may not be the best ones:
Anti-Virus:
* AntiVir Personal 7.00.04.13
* Avast! Home Edition 4.7.986
* AVG Free Edition 7.5.467 <~~ my choice
Anti-Spyware:
* Ad-Aware 2007 beta 6 <~~ (I use older version)
* AVG Anti-Spyware 7.5.0.50 <~~ (on my XP desktop)
* Spybot Search and Destroy 1.4
* SpywareBlaster 3.5.1
* Windows Defender 1.1.1593 <~~ (on my Vista laptop)
Firewall:
* Comodo Firewall 2.4.18.184 <~~~~
* PeerGuardian 2.0 Beta 6c
* Sunbelt Kerio Personal Firewall 4.3.744
* Sygate Personal Firewall 5.6.2808
* ZoneAlarm Free 7.0.337.0 (Comodo gives me more control, otherwise I liked this)
Other Utilities:
* HijackThis 2.0.0 Beta <~~ (I use older version)
* CCleaner 1.39.502 <~~~~
Phew! Now that's finished, browse the site for other things you might want. For PDF files, I highly recommend Foxit Reader instead of Acrobat, but if you need in-browser PDF support, I recommend getting an older version of Acrobat Reader, like 6.0. After that, they just keep getting more and more bloated and slow. I also highly recommend OpenOffice.org 2.2.0 to replace Microsoft Office, the K-lite Codec Pack (includes the Quicktime and RealPlayer Alternatives, because the originals are bloat-ware), and 7-zip for all those archive formats.
And lastly, put all that stuff you saved back where it belongs. Now you are all set!
SECTION 2: JUST A THOROUGH CLEANSING
Well, if re-installation is too drastic or doesn't sound good to you, then skip to step 3 of section 1 and run the most important ones, being anti-virus and anti-spyware, and then CCleaner. If you do this just right, there is a chance you may be able to get your system running almost like new again. Most likely it won't be as good as the reinstall, however. Running anti-virus and anti-spyware should be pretty intuitive, and you might want to run some web-based ones as well. But CCleaner can do wonders if used correctly:
After you've installed it (I chose not to use the context menu and stuff; you can change it later under Options), click on 'Tools' in the sidebar, and start uninstalling ONLY the things that you recognize but no longer want. It would not be good if you uninstalled some strangely-named software that is critical to one of your more heavily-used pieces of software.
You should see Startup on the left as well, so next click on that and delete the entries for the things you don't want to start up with your computer. If your computer starts up slow, this is probably the main culprit. This method is much more preferable than the "msconfig" method some people may suggest, because that way still leaves the registry entries. I have only four items that startup with my desktop, NvCplDaemon (context menu for my monitor settings - my wife likes a different resolution), AVG antivirus, AVG Anti-Spyware, and COMODO Firewall Pro.
Then go up to Cleaner and run it, then go to (registry) Issues, Scan for them and fix them. It's always a good idea to back up the registry when changes are made, which CCleaner will ask if you'd like to do.
By now you should have sped up your computer considerably. For another small boost to performance, right-click on My Computer, go to Properties, click on the Advanced tab, and click on the Performance Settings button. You will probably have everything checked. I only have 3 things checked:
Show window contents while dragging (a personal preference)
Use common tasks in folders (the nice section on the left of every folder window)
Use visual styles on windows and buttons (for the XP look, as opposed to previous versions of Windows).
SECTION 3: *GULP* SWITCHING TO LINUX!
Okay, this is a big stretch so I'll try to keep it short. On the off chance you would be interested in an alternative operating system, as a Linux enthusiast I would be remiss if I didn't inform you of a good place to start. I made it sound scarier than it really is - you don't have to get rid of Windows to try Linux. In fact, you don't have to get rid of Windows to install Linux! You can get what is called a Live CD, and give Linux a try without changing anything on your computer at all. If you want to install, it will give you the option to install right next to Windows in the free hard drive space, and when you start the computer, it will give you the choice of which operating system to boot into.
Two years of age is really the sweet spot for Linux, where all your hardware is very likely supported. I recommend the Linux "flavor" (called a distribution or "distro" for short) named Ubuntu, which has been very quickly growing in popularity over the past year or two with its ease of use and large support community. They just released the latest version (7.04) a week ago. Here is a screenshot:
Ubuntu default desktop
If you don't like the look of that desktop (called Gnome), they offer another version - called Kubuntu - with a different "desktop environment" called KDE:
Kubuntu default desktop
Same system, different look. If you don't want to spend all that time and bandwidth downloading Ubuntu, they will ship you the Live CD of Ubuntu and/or Kubuntu completely free of charge. If you'd like to know more I'd be happy to elaborate further, and there is tons of info out there that you can refer to.
Sorry for the long post, but I hope you find this information useful and enlightening. Whatever you decide, good luck!
- Luke