The Svchost process has been in high CPU for many years, and Microsoft released patches to fix the problem as early as 2007, but it was for Windows XP SP2, and the same problem appeared on SP3. There is user feedback that the Svchost process will pull the CPU occupancy rate up to 100% after the new installation (clean install) of Windows XP SP3.
In November and early December, Microsoft released two updates for XP, attempting to resolve the svchost problem by removing a large number of IE6 and IE7 obsolete updates. Unfortunately, none of them worked. This week, Microsoft released a January 2014 patch for systems such as Windows XP that completely fixed the svchost process issue.
Dustin Childs, Microsoft's Trusted computing project director, said Microsoft replaced IE's old security update with a new version in the Tuesday patch, which improved the user experience and reduced Windows Update's time to check for installed updates before installing patches. This move is purely to improve system performance without impacting user security.
One of the most notable effects of this is that it solves the problem of CPU-intensive Svchost processes running Windows Update. Although it is less than 3 months before Windows XP stops technical support, Microsoft's attitude is Wei.