Having issues with DirtyDefrag.exe thing and can't get rid of it? No worries, you could try to implement the removal tutorial in this post or download automatic removal tool SpyHunter to help yourself out effectively.
What is DirtyDefrag.exe Actually?
Name: DirtyDefrag.exe
Type: ransomware
Risk level:high/severe
Target OS: Win xp, Win7, Win8, Win vista
Vulnerable browser: IE explorer, Google Chrome, Mozilla Firefox etc.