MAJOR problems with explorer (not IE)

[koinek]

The other day I installed Audio Surgeon shareware. Since then my explorer is acting up. Everytime I use a Windows short cut which uses the windows key on my keyboard (like Win+E for Windows Explorer), the start menu bar locks up and works only if I close Explorer from the Ctrl+Alt+Del menu, but then too if I try the same shortcuts, the problem occurs again.

Also my system has generally become slower and less reliable since this incident. Also I cannot open some Office files by Double clicking, it has no effect. I have to manually open the app and then the file. Also Photoshop refuses to open.

AAAAAARRRRRRRRRRRRRRGGGGGGGGGGGGGHHHHHHHHHHHH

I've tried reinstalling windows and running things like scandisc, Norton Anti Virus (with the latest update), getting all the windows critical updates....but nothing has worked.

I have a P4 1.7, 256mb RAM and A TNT2 gfx card.