Explorer Bucking Froken

Hey guys, windows is wonderful:

1. Explorer boots up frozen.
2. Restarted, quicklaunch and toolbar works, but clicking on the desktop or
   start menu freezes it again (as does <Windows-key>-R).
3. Task Manager works, allows me to run programs.
4. Went to M$'s site, downloaded updates, rebooted, still broken.

Running Windows XP SP2 on HP Pavilion zd7010 laptop (the one with a numeric
keypad).  Last thing I did was turn it off by holding power because it failed
to wake up from sleep state (oops?).

Help?

>>10
Yes, what I mean is, that's not erasing your data, it's still there, only you've rebuilt the filesystem and threw the old MFT away, but even most of that is still where it was, just not accessed.