Taskmanger error

[lombardo65]

First time posting, i've tried everything to correct my problem without success, i hope someone can help me.
Everytime i open the task manager i get the following message:

Taskmanager error - bad image

c:\windows\system32\taskmgr.exe\utildll.dll

and its driving me made, when i play games they freeze and again come up with the above error. if i click ok then the games starts no problem.

I ran a virus checker (mcafee) and that came back negative, ran spybot and hijackthis, again with no joy.

Anybody got any ideas

Thanks