Windows 7 - Windows Theme Changer problem - my EXPLORER crashed !!

hi there...i use WINDOWS 7 ULTIMATE x64....i replaced the "explorer frame" file with some unsupported file type i guess...i cant get the EXPLORER to load....i get the following error message :

expstart.exe-
failed to update BITMAP '6801':24
failed to update BITMAP '6802':24
failed to update BITMAP '6803':24
failed to update BITMAP '6804':24
failed to update BITMAP '6805':24
failed to update BITMAP '6806':24
failed to update BITMAP '6807':24
failed to update BITMAP '6808':24
failed to update BITMAP '6809':24
failed to update BITMAP '68010':24
failed to update BITMAP '68011':24
failed to update BITMAP '68012':24


(then this error-)
explorer.exe-Application Error-
"the application was unable to start correctly(0xc000007b)"

Did you use Windows 7 Start Orb Changer my any means? If you so did try to reverse the chages, or better still do a system restore. Here's how to do system restore: System Restore - Windows 7 features - Microsoft Windows

Welcome to Seven Forums nawon. Try running the System File Checker. It will undo any other customizations you have done however.

SFC /SCANNOW Command - System File Checker

A Guy