hi there... i'm running an xp 2600 512 ddr win xp pro sp1... been running fine for about a month...and just starting from today, i got a warning that virtual memory is running low.. so i open up task manager and see explorer.exe taking up about 300mb..?!?! quickly went for reboot, and after a few minutes explorer was at 300mb again... even turning off computer this problem doesn't go away... anyone know what could be causing this?