Installing Visual SourceSafe after installing LabVIEW should not cause this problem. The cause of the problem is most likely missing or corrupted registry entries for Visual SourceSafe. There should be a key for Visual SourceSafe located in the HKEY_LOCAL_MACHINE\SOFTWARE\SourceCodeControlProvider\InstalledSCCProviders path of the registry. The data in this key should point to another location in the registry that gives information about where Visual SourceSafe is installed along with the location of the ssscc.dll. You will want to make sure that this information is found in the specified key location. If this information isn't found, you can try and copy the registry information over from another computer with Visual SourceSafe. If this doesn't work, you
will most likely need to reinstall Visual SourceSafe so it can fix the registry.