RejZoR
18
866MHz CPU is quiet slow now so you can’t expect it’ll work without any performance penalties. I/O Reads are normal since avast! is antivirus and needs to access files very often. Memory usage is also fine,so i don’t see the problem except too slow CPU.
Try overclocking it or buy new one. Faster CPUs for this socket shouldn’t be too expensive and you could get some nice performance gains.