http://www.prevx.com/filenames/533778478874317388-X1/MPSIGSTUB.EXE.html Nod32 firewall is asking to connect to the internet. scanning with prevx, nod32 and sas didn't shown any problem. From google i found out it could be of part of Microsoft Windows Application. http://www.fbmsoftware.com/spyware-net/process/mpsigstub_exe/888/ What is the best next step
If you like you can send a scan log to Prevx to see if your version of Mpsigstub.exe is clean? https://www.wilderssecurity.com/showpost.php?p=1662381&postcount=1 HTH, TH