This link on bleeping computer speaks of it - http://www.bleepingcomputer.com/virus-removal/
PC Repair is a fake computer analysis and optimization program from the FakeHDD family of rogues. This rogue displays false alerts that state your computer's hard drive is having problems in order to scare you into purchasing the program. PC Repair is installed through hacked sites that exploit vulnerabilities in software that may be installed on your computer. Once installed is it will display false error messages and security warnings on the infected computer. These messages will state that there is something wrong with your computer's hard drive and then suggests that you download and install a program that can fix the problem. When you click on of these alerts, PC Repair will automatically be started.
PC Repair will be configured to start automatically when you login to Windows. Once started, it will display numerous error messages when you attempt to launch programs or delete files. PC Repair will then prompt you to scan your computer, which will then find a variety of errors that it states it cannot fix until you purchase the program. When you use the so-called defragment tool it will state that it needs to run in Safe Mode and then show a fake Safe Mode background that pretends to defrag your computer. As this program is a scam do not be scared into purchasing the program when you see its alerts.