Worked after virus infection

After downloading some stuff off the internet I started noticing that some of my files kept disappearing and my computer was running slower than before. After finding out that I may have a virus, I downloaded an antivirus and removed it but some of my files were still missing. I then downloaded VirtualLab Data Recovery and after purchasing the full version I was able to get all of my deleted files back. I was so happy that I got through all this with no looses.