Thank you.. You didnt mention trying this.. And these steps should allow us to repair the computer, without reinstalling windows or removing any of the vendor specific drivers you mentioned.
try starting with the machine fully off. ( hold down power for 30 seconds to make sure its off, and not just in sleep or hibernate mode )
Then, turn the machine on and immediately start tapping the F8 key.
You should see a menu of options, choose safe mode with networking.
if it gets stuck on a white line of code, copy down the last line of code and send it to me here. If it loads into windows in safe mode. Then try this next
Click start, all programs, accessories, system tools, system restore..
Click, restore my computer to an earlier pont, then click next..
We want to choose a restore point that was at least one day before the issues started..
Carry out the restore. the computer will restart, then let me know if that fixed the issue or not..
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Senior Technician and Network Switching Systems Operator / Maintainer.