Can't Login or resume from Standby/Hibernate (XP Pro)


Limp Gawd
Jun 7, 2003
I'm running XP Pro SP1 on the hardware in my sig, I can login fine after rebooting the machine, but if I try and logout within Windows or try to resume from standby/hibernate i get a dialog box with the following information and then a BSOD.

Title: Winlogon generic control dialog: winlogon.exe
Content: The instruction at 0x017868a5 referenced memory at 0x017868a5. The memory could not be "read".

The blue screen gives a stop: c000021a.

I've done searches of the MS knowledge base, but haven't found anything that pertained to this specific problem.

Any thoughts on why this is happening or how to fix it?