Explorer 100% CPU Usage

[Oktay Sari]

I have a very strange problem.
Comp. Specs:2Mhz Processor and 512Mb mem.
Legal Version of XP Pro with SP1 installed and NAV with
latest AV signatures.Occupation: System admin for 6 years
so no beginner..For the past week I have not installed or
uninstalled any software. Everything worked fine yesterday
but today whenever I want to browse the HD, explorer.exe
consumes 99% CPU usage and doesn't restore to normal
values.I have to restart the process to continue
working.All seems OK until I again browse the HD.Scanned
for Trojans, Virii and spam with null results.Also did a
remote scan and online scan of computer.Problem still
exists.Tried Diagnostic startup (msconfig).Tried other
user logon (thought may be a profile issue)created new
user from scratch.Start up with minimum services(excluded
AV etc.)Nothing helped. However..I started in save mode
with and without networking, and now I can browse the HD
and explorer does not freeze. I don's simply wan't to
restore a Ghost Image without knowing what coused this
problem.Found nothing on Microsoft site or internet at all
what I haven't tried already..except install from scratch.

 

[ToGrok]

I also have the same problem. It happened after I downloaded the two
critical updates from Microsoft. I then did a scan at www.trendmicro.com
and removed a virus. I though it was gone until I tried to look in My Docs,
then it came back. Let me know too when you find the problem, I'll keep
looking here.

 

[Oktay Sari]

Sadly I gave up after a couple of days.
I could not find any Virus,Mallware or spyware.
As frustrated as I was I decided to restore an image of
the OS. After I restored to what I think the same
situation with all updates and SP1 everything works fine.
I just hope it won't happen again.
I'm sorry for the ones who also are going to restore their
systems but would appreciate if someone solves this
problem also posts the sollution.

Thanks all anyway
regards
Oktay