What anti-virus software are you currently running?
Will you system allow you to download anything? You may need to download and then upload to your system. If you do it make sure the media being used cannot be written to when it is inserted into the infected computer. If an infection is what is happening.
If you can, there are several free anti-virus programs, if you can download them. One is Link Removed, and I will use Link Removed - Invalid URL occasionally.
Maybe someone will come along that knows more about this than I do. I will tell you there does seem to be quite a bit of virus/malware type activity going on...
Sounds like you already know about Link Removed.