Got the same problem!!!

here it is; Got infected by msn messenger with a link that appeared saying …check out my new website blablabla… thought it was my friend who wrote it, so I clicked on it, and bang!!!

Trojan… deleted all the files, and noticed that there was some avast files infected. After deleting everything i thought i was all good but can run messenger computer crashes and shut down. I deleted msn and download a new one… same problem… deleting avast cause had files infected and run Norton and a malicious removing tool from Microsoft without success still crashing…

Before crashing i had a message saying that the operating system is infecting!!! What does this mean? I know shit about PC, and im worried of losing everything here…

I reinstall avast now and will give it another shot but please HELP ME!!!

cheers.