Audio files missing from sessions and I don't know why HELP!

[HipHopHead]

I am losing audio files from my Pro Tools sessions and I don't know why. I saved them with no problems, but now the sessions are empty and the bounced .wav files are completely gone. Even the back up files are empty. I get a screen that says "missing audio files with the options to skip, manually find and relink, or automatically find and relink" but none ever recover the files. What can I do to get the audio files back or are they gone for good?? I recently discovered that I have the HTML/Framer and JS/Downloader viruses so are they the reason my songs are disappearing?? Luckily I have the .wav and .mp3 files of the songs and I did back up all of my tracks, but I'm scared to start a new project if my files are going to keep disappearing. Any advice or knowledge out there???