Cannot system restore

I get an error message MRTJET35.EXE-DLL Initialisation failed? The application failed to initialize because the window work station is shutting down? This manifests quickly just before the computer shuts down. It has become apparent after uninstalling Lime Wire, which was recently downloaded from the web. I have tried a system restore but it fails to complete however far I go back. I’m suspecting it’s ad ware but not certain. Either way all scans have shown nothing untoward