Vista - Windows explorer freezes when moving and deleting files

When I try to delete or move a file the green status bar in the windows explorer window keeps moving but the window freezes. I have to go into my task manager to get rid of it. Also, when I rename a file the window freezes.

My computer is a little over a year old and I think this problem started the day my Spy Sweeper subscription (that came with my computer) ran out. Although, that's probably just a coincidence?

I've already tried google and read this post but it doesn't seem to be a right-click problem since I use the delete key to delete files and drag and drop files to move them.

I've also already tried the Cannot rename or move a file or folder in vista fix by Brink and had no luck.

Windows Vista Ultimate With Service pack 1 (I had this problem before installing SP1)
System: 32bit
HP model: m8034n desktop
RAM: 2.00GB
Processor: AMD 64 X2 5000+ 2.60GHz

Try this for kicks and let me know if it helps:
Windows Explorer hangs when deleting or renaming files