My daughter's Compaq Vista laptop has developed a bad problem. The CPU\nusage is stuck on 100%, making it very slow to use the machine. What I\nfind hard to understand is that in Task Manager the only process using\nany CPU is taskmgr itself, which is using about 10%, but the total usage\nshows as 100%. Are there processes that do not show up in Task Manager?\n\nI have just run sfc /scannow, which looks for corrupted system files.\nOn completion is said that there were errors but they could not all be\nrepaired. I looked at the log file, CBS.log, which has hundreds of\nlines that don't mean much to me.\n\nAny suggestions?