This error message relates with permission issue (UAC) on Windows Vista and Windows 7. To solve this problem, you have to re-run the installer again using elevated command prompt by run the command prompt as administrator and execute the installer in there. If you are using 64-bit Windows, you should use the command prompt at C:WindowsSysWOW64cmd.exe instead. Otherwise, you can use the command prompt at C:WindowsSystem32cmd.exe. You will see the step-by-step guide to use elevated command prompt to execute the installer file on the section below.
The other solution, you can disable UAC on Windows but I don’t recommend it since it will lower your security system.