[sfx1999]

Try this instead:

1) Exit steam.
2) In the main steam folder delete everything but unwise.exe, steam.exe, and writeminidump. DO NOT DELETE THE FOLDERS!
3) Go into bin and delete everything in it.
4) Run steam.exe. Wait for it to update and see if it works.

BTW, this is the way I use to fix the "Steam has caused an invalid page fault in steam.dll" error and it always works for that. I have not tried it with anything else.