Hi all, I've been having this problem with svchost basically since I've had this laptop. I bought this computer the week SP2 was put out and I upgraded to XP Pro SP2 as soon as I got it. Then, I was running a spyware scan and virus scan and it detected something it called adware virus. No other details. What it did to my system was create a 2 minute hang during the startup process and other problems I just found later. I've fixed all but one of the problems and that is the svchost hang.
Svchost.exe has 6 instances running on my system at once which isn't much of a problem. What is a problem is the largest one (21, 608 K currently but I've seen it to 30,000 K or as low as 16, 000 K) will freeze when the system comes back out of hybernation. It doesn't always do it but it does it more often if I put the computer into hybernation after listening to music. It will then take 50 % of the CPU power which drives the fans on my computer crazy and slows the system a little. The only way I've seen to get rid of it is to close the bad svchost in the task manager and restart the system. If you just restart the system will not restart with svchost doing this. Also, when this particular svchost is closed in the task manager the sound will not work. I've tried uninstalling my wireless card drivers, regular network card drivers, and sound drivers and then reinstalling them but it hasn't fixed this particular problem.
The problem svchost is listed under the username "SYSTEM" in the task manager. The others are in "SYSTEM" "NETWORK SERVICE" and "LOCAL SERVICE."
Do you think posting a hijackthis log in the hijackthis forum would help?