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Computer freezes after key press

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3 replies

by pendelhaven

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Recently, due to some minor boot problems, I formatted my computer and reinstalled the OS (Windowns XP SP2) using a different CD (the first one was SP1).
After installing/updating some drivers and softwares (don't remember which ones) the problem started: during/after the boot, if I press any key on the keyboard the mouse and keyboard freezes completely. However, this don't happen all the time.

I already tried to turn off all the startup softwares, tried to update even more the drivers and used the Windows Update to see if it fix the problem. No success.

3 replies

by jdmercha

Booting into safe mode

A different keyboard and mouse

Swithing the ports (assuming they are USB devices)

by funwriter

well, if booting into safe mode and "last known good" do not help, check if the keyboard drivers i8042prt.sys and kbdclass.sys are installed correctly. in particular, the registry key under HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4D36E96B-E325-11CE-BFC1-08002BE10318} should have an "UpperFilters" that contains "kbdclass" as a value.

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