about explorer.exe crashing with window 7

I started notice the problem when I tried to move a file to my exteal HD, and my explorer.exe just kept crashing, but it will restart back up. later on, I realized that its not just moving files to exteal HD, it crashes every times when I try to move any files to anywhere. I done many searches about it, but somehow I just couldn't solve the problem. I was wondering if anyone can help me.

I installed 'WinThruster', it supposed fix the error with explorer.exe crashing, it didn't. I was also trying to using DLL Suite, but I'm worried its not goa do anything again and I would spend money on another program that doesn't work.

help me please!!! thank you