I suggest you download this and run it. You'll find out...you didn't do such a good job.
MRU Clear
http://files3.majorgeeks.com/files/fc50322932b29b26cfc46fd9a91ec474/drives/mruclearsetup.exe
MRU Clear
http://files3.majorgeeks.com/files/fc50322932b29b26cfc46fd9a91ec474/drives/mruclearsetup.exe