I have a desktop with
windows XP, service pack 2
Pentium 4 - 2.4 GHz
512 MB of RAM
The system Idle process is showing it is using 96 - 98% of resources
I run norton antivirus ion a regular basis and all definations are up to date.
I also run spysweeper and microsoft antispyware
The hard drive has been defrag'd
Anything I am missing?