Hey Guys! I'm new to this forum.. Presently i've WinXP SP2. I recently installed a new Firewall called "WebRoot Desktop Firewall". After that, i've Windows Installer runs automatically running my Bluetooth service, without me doing anything.. I set the "Windows Installer" service to "Manual". But it still shows "Started". I also removed "Bluetooth" software from my PC. So i removed the file 'msiexec.exe' from c:\windows\system32 from my PC. After that, PROBLEM SEEMED TO BE SOLVED, but the problem comes once in a while.. Can you tell me is this a virus? Could deleting of 'msiexec.exe' file have any effect on further installations ? Please shed some light on this problem!!