Quick Defrag is a Virus/Malware which is not very Old but taking a big hit with the start of Year 2011. It disguises you saying your PC has lots of errors and need defragmenting, and pose himself as legit good program to protect your PC. And Be seeing a lot of popup/ Browser redirects and this security message you fall for trap and decides to buy this piece of shit which does nothing but create more problem for you.
Once you are infected with it, It won’t let you open any Executable program, whatever you try to open A pop up will comes up saying your operation could not be completed due to Hard disk errors, Once you close this another popup will ask you to scan your system. If you say yes to Scan after sometime you will be shown a list of error with option to download Quick Defrag utility to fix these. Even if you decide not to use it and restart the Window, you will find that Quick defrag has already installed there and sitting on your computer. Now it is creating more problem and the Fake security alerts will keep coming more frequently as it has already installed his malicious code.