Windows 8.1 install crashed my keyboard and touchpad

I attempted to install 8.1 last night having forgotten about the warnings. Had the black screen of death this morning. After rebooting Windows reverted to 8.0. But now my keyboard and touchpad arent working.  Says the ps2 compatible drivers arent
working. Every reboot and driver update I try does nothing. any help would be greatly appreciated.

keyboard and touchpad arent working.
Sounds like a laptop?  Which model?  Is there any alternate input you can use?  Touch?  USB for wired or wireless?
Can you at least use your keyboard when booting?  E.g. get into the Command only boot?
Robert Aldwinckle

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