Boot a linux live cd and see if that can access the web via wired.
If it can then I doubt there is any hardware busted.
Next step is to spin in your backup.....if your not making backups you just found out why you should.
The final step is a bare metal install.....painful.
Btw.....your doing that winupd stuff wrong.
Set winupd to just tell you there are updates don't download them.
Select the ones you want and hide the rest.
Then allow winupd to continue.
So here's my situation: I have a custom desktop computer bought from iBuyPower years ago, which I use exclusively for gaming. I turned it on yesterday, opened Steam to browse the storefront as I usually do, then stepped away to use the toilet. By the time I came back, there was a perfectly ordinary Windows message saying updates had been installed and it was counting down to restart, so I closed Steam and clicked "Restart Now."
Immediately upon rebooting, my network connection has been broken. The desktop has a built-in wireless adapter (802.11bgn 1T1R) which came free with the order but I never use in favor of an ethernet connection (Realtek PCIe GbE Family Controller). It has always been plugged into the router via ethernet, just like the laptop I am posting this from. The laptop, router, modem, and cables all work fine, and nothing physical seems amiss inside the desktop tower, so it is unlikely to be a hardware issue. The Windows updates are literally the only variable between now and when everything was working normally.
My desktop runs Windows 7 Home Premium and the specific updates installed yesterday are KB4087364, KB4344152, and KB4343900. If it helps, here are the hardware specifications:
Motherboard: ASUS M5A97 R2.0 -- AMD 970 w/ 2x PCIe x16, 2x USB 3.0, 6x USB 2.0
Processor: AMD FX-6300 CPU (6x 3.50GHz/6MB L2 Cache)
Memory: 16 GB [8 GB x2] DDR3-1600 Memory Module - Corsair Vengeance
Video Card: NVIDIA GeForce GTX 760 - 2GB - Single Card
Hard Drive: 2 TB Hard Drive -- 64MB Cache, 7200RPM, 6.0Gb/s - Single Drive
Sound Card: 3D Premium Surround Sound Onboard
Network Card: Onboard LAN Network (Gb or 10/100)
I know those last two are vague. iBuyPower doesn't provide exact details here. I'm not a techie, so I used their configurator when making the purchase and haven't made any modifications since then.
Windows Network Diagnostics can't identify the problem. I opened the Network and Sharing Center, clicked on "Connect to a network" and get a message saying "No connections are available" even though it is still plugged in via ethernet. Trying the troubleshooter here returns this error:
Package ID: Unknown
Error code: 0x80070057
Source: Command line
User: [Computer name]\[User name]
I made sure the Local Area Connection was enabled and that network discovery was turned on; no affect. I tried using System Restore to rollback the updates, but it fails and returns “an unspecified error” code 0x80070005." (Trying this from Safe Mode doesn't work either.)
I tried uninstalling the new updates directly, then reinstalling them through offline installers. I tried downloading and repairing up-to-date network device drivers directly from the manufacturer. I tried running a deep scan with my antivirus software (IOBit Malware Fighter 6.1 Pro), then disabling the antivirus to see if that was blocking something.
I tried running netsh command prompts to reset IPv4 and IPv6, and then sfc to find any corrupted files. I tried restarting services and looking for errors in the registry. I tried creating a new user with administrator privileges, but the Windows User Service fails at the login. I even tried the old "unloading power" trick.
Nothing I've tried works. Indeed, it seems like I'm only stumbling into more things that are broken. Is there anything else I can do, short of formatting the HDD and reinstalling OS from scratch?