I updated to win 8.1 update1.After which there has been lot of problems.Laptop started running slow.After desk top opens it freezes.I decided to use restore point after using troubleshoot .I got an error that I need to temorarily block anti virus programme Kasperesky 2014.How to go about blocking antivirus through command prompt?.Is there any other way?
I tried using refresh mode.But again error says that I have to unlock drive containing WIN 8.1 OS.Please advice how to unlock drive when 8.1 is frozen?