I was having the Windows Vista as the only operating system on my PC now I have recently upgraded to the Windows 7 and along with that I have the Microsoft Security Essentials with me. Now the issue with the same is that when I try to go for the Full scan I have noticed that the scan some times halts or some time it has been observed that it takes too long to scan the things. I have not yet managed to fetch the exact solution for me and in addition to that I am clueless regarding the same. I do not know to whom I should blame for the same. Please suggest.