Windows media player error playing movies

Hello
I purchased a new personal computer a few days ago.
Everything was working perfectly fine until today when I got an error while trying to play a movie in media player.
It gives me some version Miss match error which is given below.

Windows Media Player
The file wmploc.dll has a version number of 11.0.6001.7000 where 11.0.6002.16489 was expected.
Windows Media Player is not installed properly and must be reinstalled.
Do you want to install the Player form the Microsoft Web site?
I was first shocked to see this error making video play back almost impossible as I saw some movies in last days on the media player and every thing was working fine and steady.
Then I tried to update media player and install patches but every thing goes into a vein.
Please suggest a work around for this error.
Thanks.
