Hello Sir/Madam

Firstly i am not sure, where to post this question; so if this is a wrong section then please move it to the appropriate section and forgive me.
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My Windows Live Messenger (MSN) is not opening

i am using MSN (Plus) for more than 2 years now and i use it almost everyday. And for the first time ever in my experience, its not opening.... Usually when i turn on my PC MSN opens automatically. But it didn't  then i double clicked on the MSN icon...and  for about 2-3 seconds it showed the loading sign on the mouse cursor.

Then i clicked on MSN icon 2-3 times ..... No result at all

Then i went to the Task Manager and went to process and i saw 4 "msnmsgr.exe" and all 4 was using  about 19,800K - 19,950K Memmory

i tried after ending those process but nothing happened... same thing

i have Eset Nod32 Anti Virus Intalled on my PC , i used this software to run a Computer Scan

and it found a infection in

"H:\Documents and Settings\Jomy Jose\Application Data\warnownsmags\bdwmuziz.exe"

and gave me a description of

a variant of Win32/TrojanDownloader.Swizzor.NCW trojen

and told me that its Cleaned by Deleting; to make sure everything is fine i went to the Folder path and the "warnownsmags" folder was empty and then i restarted the PC and then tried to open MSN again..... Nothing new Happened
and i ran the scan again this time they didn't find any infections

I have also got a problem with Internet Explorer (IE)

When i open IE it opens and after 2 seconds it just closes itself.

Now i am using another Browser and using Ebuddy to use MSN

Please Help me ASAP

i am waiting for your Valuable Solution