Windows MSN virus

So here is the problem my stupid little sister out one of those spam virus on my temporal comp, Because of the virus (I think) I cant run any kin of malware detector or cleaner for msn.

Is there any other solution or Will I nee to restore the system to an older state?

any help is appreciated

pd: I cant use the 1678 Messenger edition either.

Okay, forget the MSN part of this issue. A version of MSN not running is the least of your worries.
You got a virus, CONGRATULATIONS!

Sarcasm aside,

first try a system restore to.... lets say 2 weeks ago.
If that fails then we can try other methods like:

-Running "Hijack This" and sending a copy of the log file to someone on the forum. (I can analyze it myself, or someone else can)

-Rebooting in Safe Mode and attempting to single out the issue there.

-Attempting to check for suspicious files that are set to run on startup

-Try downloading Malware Bytes

If all of these fail then we will take a different stance to this virus when the time comes. But One if not ALL of these should help.