Can Not Install Applications in Windows 8

Today an student approached to me and asked about why he can not install an application on his computer. He told me that the computer says he has insufficient privilege, even though, he is using administrator account on this computer.

First I tried to right-click on this *.msi file to see its properties. I plan to select "Run this program as an administrator". Unfortunately this section is disabled.

After doing some Googles and trying suggestions, finally I found a suggestion which works. I'm not sure this is a good solution. Anyway it fixes the problem. Below is the solution.

1. Type secpol.msc in the Start Menu and press Enter.
2.  Double click on Local Policies then double click on Security Options.
3. Scroll to the bottom to this entry -
4. User Account Control: Run all administrators in Admin approval mode.
5. Double click that line.
6. Set it to disabled then press OK.
7. Reboot.

Basically from Windows Vista, there is a so-called  User Account Control (UAC) which limits the softwares to be able to installed. By disable the "User Account Control: Run all administrators in Admin approval mode", all the policies from UAC are disabled and now you become a real administrator without any limitation. If you know what you are doing on your computer, I recommend you to disable this on your computer to have full control.