recently my computer has been locking up and i'm a bit puzzled as to why. everytime i go into my pictures and double click on a picuter to view it, the computer locks up. it only does this when i view pictures. i don't understand it. my current system settings are P4 3.0-OC'ed to 3.2, 9800 pro, and muskin pc3200 ram, windows xp. i thought at first it was my OC so i put it back down to where it was originally and it still did it. i have noticed when the lock occurs i have no apps running in my task manager but i have 2 processes eating my cpu up. explorer.exe is using 48-51% of my processor and system idle process is also doing the same. what are these two processes and is this what is causing it?