Memory Problem

Xref: kermit microsoft.public.windowsxp.perform_maintain:173722

I have developed a recent memory problem with my system.
I have noticed that recently most of the memory on my
system is being used or "taken" by the system cache. I
have 256MB of memory, but after boot up I have
approximately 75-80MB in available memory and about 145MB
in system cache. If I monitor it, I can see the system
cache growing while the available memory shrinks.

I found a 3rd party program online that frees up the
memory to where it should be. Once I do that, the system
cache begins taking memory again. I checked the
processes and the problem seems to be in an SVC.exe
process. Right after boot up it is around 20MB which
seems very large to me. I have checked for viruses,
spyware, etc. Nothing has worked. I would appreciate
any help you can give me.

Thanks