Sometimes when opening windows explorer 20to30 seconds freeze/time

Question

Hi,

Sometimes when I double click into my computer or anything that opens windows
explorer (ie rubbish bin etc) it sometimes takes 20 to 30 seconds to load.

But with everything else it is fast. I've got Windows Ultimate with Intel
E6600, 2gb
ddr 2 ram, 7850Gt graphics. My index score is 5.3. What could be causing this
slow down?

Might this maybe have to do with Mapped Network drives or? I have (at least
not yet) heard anyone else without these mapped network drives with the same
problem. My computer is a member of a domain. Has anyone else this same
problem, or anyone knows what is causing this?

Rene