Windows XP: Explorer.exe uses up 50% of processor after accessing 2nd HD

Explorer.exe uses up 50% of processor after accessing 2nd HD

Hi,

I have a weird question that I've been trying to resolve for a few days. I have a Dell Dimension 4700 Pentium 2.8 GHz 80 GB Maxtor hd (master) and a 500 GB Seagate HD (slave) both SATA and 4.0 GB memory and Windows XP Pro SP2.

The thing that happens is this, When I access a folder on the second HD the computer slows down, and I have noticed on the task manager that Explorer.exe is taking up 50% of CPU usage and the system idle process is also taking up 50% of CPU usage. The main number below the CPU is being used from 40-60% of total CPU use.

Now, I have all my data on the second hard drive, the second hard drive has 2 partitions (400 GB and 100 GB) I have noticed the resources only go up when accessing a single folder containing videos. It goes up but never comes down until I reboot even idling the CPU is working at +50%. I have run anti spyware, anti virus, anti adware software but it doesn't find anything. What else can I do to stop this annoying problem?

Thanks.

Al