There are two types of administrator access to consider when running the KInstall.exe wizard.
KInstall.exe. This applies to all operating systems.KInstall.exe and selecting the Run as Administrator option to install KInstall.exe. This applies to the following supported operating systems only: 
Changing Your User Account Type to an Administrator Account
Windows 7, 8, 8.1
Control Panel\User Accounts and Family Safety\User Accounts\Change Your Account TypeNote: If the user account your are using lacks sufficient permissions to perform this step, you will need to logon as another user with administrator access to make the change to this user account.