If your not sure your computer is clean, then use a
online scanner, check your computer there, a virus scanner you have on your computer can be tricked to believe a file is safe when it's not. The online scanner is a bit aggressive, it will remove everything that are infected without asking you, but it working great, i using it at lest 1 time/week, you must run internet explorer to get it to work, when you have scanned your computer and it say you aren't infected let the people running the server know that you are clean, and that they can let you back on, if you get the same message again, tell them you have been scanning your computer both offline and with a virus scanner so it must be a false positive.
