Hi...

I'm developing Phex on a Pentium Celron 600 Mhz with win2k and never had problems like this. My CPU usage is around 10% to 20% most of the times.
Can you tell me how many files you are sharing, how many downloads you have in your list and how many simultaneous downloads you allow.
Maybe you can also try to move/rename your Phex configuration files and start Phex again. It will create a clean set of configuration files. Please tell me if this will help to improve the performance.

Gregor