1, Start->Input "cmd", Please right-click "cmd.exe" and click "run as administrator"
2, input takeown /F %windir%\system32, and enter
System will display "SUCCESS: the file <or folder>: "C:\Windows\system32" now owned by user "domain\username"
3, input CACLS %windir%\system32 /E /G %username%:F, and enter
System will display "Processed dir: C:\Windows\System32
4, Open powerpoint, System->Active, input your serial number and email, Click "Activate", if you active it successfully, System will prompt "Your PowerCom will not be activated till you restart", or prompt "Active PowerCom fail, please contact DSI for licensing issues"