This is further information on a previous query. I now have the offending computer in front of me. We have received a message from the above. When we opened it it read "Please read the document". The attached file was called "document_all.txt.exe". Unfortunately the recipient tried to open this "document" and since then the computer is desperately slow and the Norton Antivirus appears to be corrupted. Surely this must be a virus? Can we not trust MSN?