New PC (ASUS Z87-A, Haswell i7-4771, c: = 960GB Crucial M500 SSD, d: = 4TB Seagate HD). Avast antivirus
Win 8 upgraded to 8.1 ~two(?) weeks ago. All worked fine.
Auto update this morning & after rebooting neither keyboard nor mouse work. Seems USB not working in Windows (does work in BIOS, though does not seem to be anything can do from there).
Can find nothing on web about this problem.
Seems not possible to access 'Safe Mode' in Win 8 without keyboard control.
Attempt to revert to restore to 10 Nov restore point failed. Hoping to avoid trying 31 Oct restore point as a lot of software has been loaded since then.
Any suggestions?
Anyone else had similar experience