Pafe_File usage

[yehuda_1]

My system ML350-G2+ 2CPU 1.333 + 1 G Ram
win2k+SP4
on this machine I have only IIS+SQL7 with small amount of users

in the performance monitor I can see that although The memory usage is only 50% the Pafe_File usage is growing up to 30% and the machine running very slowly
I have to make boot 3-4 times a day
I checked the system hardware by F10 and it's O.k.
I checked for virus
what coud be the reson ?