my msn wil not open , the event ID is 78 , does anyone know how to solve  this ? Thanks in advance

Please read this thread and try BandAid's solution

Bandaid's solution is for event 33 my error is 78 but maybe i can do something with it , thanks

No, the solution for error 78 is the same: as you cans see, this user resolved by following the same procedure.

In fact, it's the same problem related to Microsoft Virtual Studio Runtime:

- error 78 is about a conflict between two versions of a manifest installed;

- error 33 is about a missing manifest;

The solution is the same: a clean installation of MSVRT. Remove all versions (2005, 2008, 2010), clean the registry and reinstall version 2008 + SP1 or only 2010.

Thanks , I tried what was suggested but it still doesn't work ,the side by side error is  1:C:\windows\WinSxS\manifests\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.30729.4148_none_5090ab56bcba71c2.manifest 2:C:\windows\WinSxS\manifests\x86.vc90.crt 1fc8b3b9a1e18e3b 9.0.30729.1
can anyone help me with this , thanks in advance

Ugosan , messenger is working again , i think i didn't succeeded the first time because i didn't cleaned my register , anyway, thanks !

No problem, glad to have been of help

Hi Bandaid, very useful post. Just wanted to check if the steps above are also OK in VISTA Ultimate 64-bit? I am getting event 33 in WLM, side-by-side errors in the EV. Cheers, TD.