I am starting to see this issue occur on my XP Pro clients. I still do not have an answer for it - just a work around (end task).
The above systems will be reduced to a crawl, affecting all functionality. I open Task manager and see the SVCHOST.EXE file running at either 50 or 100 %. I know this is a windows file, and at the moment, it appears to be related to network connectivity. I came to this conclusion due to the disabled workstation service and the lack of LAN connectivity - unable to browse.
I have disable automatic MS updates - did not solve the problem. I have run Malwarebytes with no success.
Does anybody have an answer for this?