hi there
Been a few month now since it has happened and I am started to get worried. For some reason my windows defender dissipated and i have no idea where to download it from to get it back. Every time I try and to update windows it does not allow me and just reverts back to a previous version of windows. I downloaded Avast Free Antivirus but i Don't really trust it, as it seem like my computer is slowly slowing down. Really need some help to get rid of any malware and virus, and help me get windows defender back. I need my computer for work cant afford it to die on my. please help!!!