I recently installed Windows 7 and now have an annoying problem. My PC locks up every 10-15 min for about 60 sec.

Here is what is happening:

-Occurs generally during browsing  

-CPU usage is minimal (0 - 15%)  

-Hard Disk Indicator lights up (however i dont hear the disk chugging along)  

-When I look at the resource monitor the hard disk utilization jumps to 100% however I dont hear the hard disk performing a massive amounts of reads/writes.  

I am starting to think that this is not a hardware problem on machine (older Dell Precision 9100 with 4GB of ram and P4 3.2). 

I am wondering if this could be something with my network?