I have an amd athlon , 3500+,2.2 gHz, 1.0 GB of RAM
Windows XP professional version 2002 service pack 2
A few days ago the system ground almost to a halt and the performance has been dreadful since
I've searched for viruses and spyware but it seems clean
Everything seems normal apart from being SLOW e.g. taking 10 minutes to logon, and being unable to play music without an unacceptable stutter.
Windows task manager says my system is using virtually 100% of the CPU nearly all the time. After the system had been idle for over an hour the CPU usage was at 100% split between two SYSTEM tasks svchost.exe (65-75%) and winlogon.exe (20-35%)
Any ideas please