winlogon.exe performed an illegal operation?

[lainlives]

i just got an error message that said
'Module winlogon.exe has performed an illegal operation.
Click OK to close or Cancel to debug'

All I did was released the lock on sfc_os.dll in winlogon's process.


i couldn't get a screenshot before it BSOD'd tho I just thought that was interesting enough to share

EDIT:
But when you release shell32.dll nothing happens. The icons even stay.

[techno_race]

What OS?
Did it look like one of the below? If so, which one?
1150
1149

[lainlives]

XP Home

[techno_race]

:p Ha, by the time I finished editing, you replied...

[lainlives]

Niether it gave me an error stack (kinda like when a game crashes) it even asked to report it about 1/8 of a secodn before it bluscreened

[tech_support]

Virus.