I caused Windows Explorer to disappear

I have had great difficulty understanding and finding things with Windows 7 Explorer; I've longed for the XP Explorer instead.

This morning I found and followed the instructions here: Fix Windows Explorer Annoyances with Classic Shell | 7 Tutorials

I installed Classic Shell (?) and selected Classic XP.

I now have nothing in my Windows Explorer except Desktop files and Wordperfect files. There's no tree whatsoever -- no Program Files, no anything.

Can I somehow get back the Windows 7 layout I had before I did this? or will I only be able to default back to the original layout without all of my additions? if at all.

Please help.

How have I missed that perfect Nietzsche quote??? This Explorer problem comes on the heels of almost a week of struggling to get Dragon 12 to work with my Windows 7 laptop and trying to get my Windows 7 laptop to print on my old HP Laserjet 4+ printer that's connected to my XP desktop. It all involves many hours of terror without end and eventual giving up.

I haven't done a system restore to a previous time, because I fear it will only take me back to the original default. How would a system image help?

I've tried to update my drivers. I have the HP Universal Print Driver, but I don't know where to put the file.

Uninstall classic shell and that should put everything back.