Okay lets start 1) First of all delete the existing key if you have. [color=#32CD32]2) Go to Setting, then select Option, Uncheck the "Enable Self Defense" and click OK. 3) Now right-click the kaspersky icon from taskbar and click on "Exit". 4) You will get a promt like this . Click "Yes". 5) Now goto run and type in "regedit". 6) Now goto HKEY_LOCAL_MACHINE ---->SOFTWARE ---->KASPERSKYLAB ---->PROTECTED ---->AVP9 ---->ENVIRONMENT . 7) Now in the right hand side you can see PCID. Double click it and change the last two values before the flower bracket and click ok.eg:- The last two values are "D7"... So i change it to "F9"... 8) Now open kaspersky again and you will see this. 9) Select "Activate Trial License" and click next. 10) Now enable Self-Defence and you are good to go.