I installed Firefox 3.5 and now each time at running time I get error message : "Firefox.exe - Entry Point Not Found"
Solution:
Go to your "C:\Windows\System32" dir
Look for this file:
DWMAPI.DLL
If it's there, either rename it to DWMAPI.DLL.OFF or move it out of the Windows dir to some backup folder elsewhere (don't delete it just yet, just incase).