After the fun I had yesterday when my computer decided to bluescreen and wipe the system config sector (I tried repairing but no dice.. it kept hanging during the repair install screen) I have got round to trying to install MSN 7 Beta but keep getting the message "C:\Windows\MSN Messener\msnmsgr.exe cannot start as the application has not been installed correctly. Reinstalling the application may fix ther problem". Now I have tried uninstalling and reinstalling the beta software, using Microsoft Cleaner to blast any bits of messenger registry entry that could be left around but may now need to restort to a manual reg import file / key cleaning. So does anyone know where the main registry keys are for this or know if there is a surefire way of fixing the problem overall? PS I won't even get started on the problem I had with NIS 2005 On another note, MSN Messenger and Messenger 6.2 work. The Beta 7 installer installs but comes up with that wierd message.