Where is Secpol.msc?

There are some apps in win 8.1 which I cant open. The message says “This app cant open using the build-in admin account. Sign in with a different account and try again”

Since I’m the administrator I cant see why I cant open any app. Searching I notice that I have to open “secpol.msc” or “GPMC” or “gpedit.msc” and when I type these commands in the Run I get the message file not found

Any solution?