[hajami]

I have two machines running NT 4.0 w/ SP 6a.
Just last week after bootup, winlogon.exe takes up 99% of the CPU.

If I unplug the network cables, it dies down but spikes up again when plugged back in.

Any ideas what it could be?
The winlogon.exe file is the same date as on a working system, I even replaced it already.

[Advertisements]

trojan or virus or other very aggressive malware.

Winlogon, in addition to its many other functions, is responsible for loading various applications it has been directed to within the winlogon subkeys in the registry.

Several nasty transponders (malware) hide themselves in there.

[gerryf]

trojan or virus or other very aggressive malware.

Winlogon, in addition to its many other functions, is responsible for loading various applications it has been directed to within the winlogon subkeys in the registry.

Several nasty transponders (malware) hide themselves in there.