I have spent some time at this and this is what I found. I am using WinXP Professional SP2.
When you end the svchost.exe process (there are many, I am refering to the one that is gobbling up the cpu) Windows Live one care will pop up to notify you that you have turned off Automatic Updates.
We used to have "Windows Updates" on our computers. At some point this changed to "Microsoft updates" and this is when cpu usage became an issue. "Microsoft updates" also updates Microsoft Office.
Microsoft has not, as of now, released a fix that can be trusted to end this problem. Many of us are trying to get them off their butts and give us a solution. For now, end the process in the Task Manager , go to the Microsoft Updater site for your downloads and contact Microsoft about fixing this problem.
When I boot up svchost.exe system very often pegs cpu to 100%. This last a minute or 2. What can I do to stop this.