COM Server application with CLSID {000C101C-0000-0000-C000-000000000046} to the user NT AUTHORITY\NETWORK SERVICE SID (S-1-5-20). This security permission can be modified using the Component Services ...

Thanks, that was the problem. I forgot that about a week ago I had edited my Group Policies and disabled Windows Messenger. I change it from disabled to "not load on startup" and it works fine now.