|I have a PC that has a mystery process that is taking around 45 - 50% of CPU resource on Win XP SP3|
When I look at the processes in task manager, everything shows around 0%, but the main % indicator at the bottom of task manager shows around half of the CPU time is being used - and I believe it because the PC is noticably slow.
Hence, it would seem to be an invisible process.
So far I've done a scan for Viruses, Malware, Spyware, Adware. Plus I've run sfc /scannow. I've also stopped all extra tasks starting up using msconfig - no difference.