computer seems to LAg when Prime95 is running
 

I can notice that when prime95 is running my computer lags a little. Opening web pages take longers, switching bewteen windows and such.

anyone else have this problem???? i thought i was only using idle time?

if there nothing that can be done i guess i'm going to have to stop running prime:(. it not worth the lag

Did you leave priority set to 1??

Is this a hyper-threading-enabled P4?

Another concern could be you are in the midst of P-1 Stage 2 with a high amount of memory allocated to Prime95. You could add the line
[code:1]OnlyRunStage2WithMaxMemory=1[/code:1]
to the prime.ini file and set the daytime memory lower.