I'm not sure if anyone else has had this problem, but I downloaded the latest version of DAEMON Tools Lite through their website yesterday, and installed it on my fresh copy of Windows 8.1. It contained a downloader virus that went to town on my computer until I hastily downloaded AVG. I had to reformat my hard drive to get rid of the the programs installed by the virus. I used the same installer again today, and during the installation of DTLite, my antivirus blocked the same downloader from installing itself again.

Hopefully this is only a problem I'm experiencing, but I wanted to warn everyone just in case the latest installer for DAEMON Tools has been corrupted.