Searched everywhere and I've seen people complaining, but
no solution.

I installed SP2 on Thursday. Left the computer running
overnight and hopped back on in the morning. CPU was
pegged at 100%. The process was msmsgs.exe. At first I
thought I had gotten hijacked somehow, even though my
system was totally fine before the SP2 install. So I
went through the process of checking out the entire
system. I'm still totally clean.

So I started experimenting. If I kill the msmsgs.exe
process and leave an iexplore.exe process running, within
minutes the iexplorer.exe process will start taking
100%. If I kill the iexplorer.exe, then the explorer.exe
will take 100% and there's no recovering from that
point. This was entirely repeatable.

This is with an Athlon 2600XP system running an Asus
A7N8E-Deluxe and all the latest drivers. Also using an
NEC2510 DVD burner, Maxtor 200GB SATA, Western Digital
160GB UATA133, Maxtor 200GB UATA133, GeForce 6800GT,
Conexant V92 Soft modem (HSF). I'm running Norton
SystemWorks 2004 with Norton Personal Firewall 2003. I
realize that SP2 isn't really necessary with a secured
PC, but I'm a hardware developer and have to have this
system up to date.

BTW, after the SP2 installation, it had problems with the
Athlon XP2600+ CPU driver. Actually said it couldn't be
initialized. Finally took a driver update and that was
OK. The modem had the same problem.

After uninstalling SP2, the system is back to normal and
the problem is gone. So I'm forced to believe that SP2
was the problem. I have not seen anything in the
knowledge base that addresses the problem. Does anybody
else have the problem? Has anybody solved it? Possibly
another developer? I'm going to bust out with a debugger
soon.