I noticed this morning that one of my bosses personal emails sent out a suspect link to a few email addresses. The issue is she has quite a few number of PCs, and isn't sure which one is causing the problem. When something like this happens, is it because of malware/spyware on the PC itself, or can this happen without having an actual infected PC? What's the best way to deal with this? Honestly when I have problems on my personal PC...which is rare, I simply reinstall Windows to be safe and completely clean. I don't think she's really interested in that. What should I do? Is there a way I can tell which PC the message was sent from?