I woke up to a “gift” from MS that almost destroyed my domain this morning by stealing just shy of 30 percent of my cpu power on my Stack Manager machine. Get Windows 10… aka GWX.exe.
I found a way to get rid of it BUT it will attempt to fight you for it.
This works in Windows 7, 8, or 8.1 but you need to boot to SAFE MODE.
The rest is a copy and paste from a web site that had the answer:
How to get rid of GWXconfigmanager.exe?
Restart your PC and enter the Safety Mode without netwrok. If you don’t know how to do this, check in google. Simply – press F8 several times right after bios finishes loading.
If possible, go to Start/Control Panel/Programs and remove the Windows update KB3035583.
In the safemode, search for the GWX folder inside C:\Windows\system32. Delete the whole folder. Then click to start menu/run and type regedit. Search for GWX within the folder Local_Machine. Delete the folder(s) named GWX. Be careful, the three characters ‘gwx‘ might be included in other keys/register folders. Delete only those named GWX or pointing to C:\Windows\System32\GWX.
Restart the computer and check the task manager to see if the process disappeared. If you uninstalled the update, check for MS updates again and reinstall the update.
— extra note, to get to safe mode on windows 8.1 you MAY need to type MSCONFIG in the run window, go to the BOOT drop down, and enable SAFE BOOT on the menu
you will also need to UNDO this to reboot normally (otherwise you will end up rebooting endlessley in safe mode!)