Turn on Remote Desktop in Windows 7 or Vista

Remote Desktop is disabled by default in Windows 7 or Vista, but it’s easy enough to turn it back on. If you need to access your Vista PC from another box, it’s an essential thing to turn on.

Important note: Remote desktop is only included in the Professional, Business, or Ultimate versions of Windows. Home editions do not have remote desktop.

Run an .msi Installer File as Administrator

An example to trying install application ".Net Pet Shop 4.0 on Windows Vista" that no right click option and must Run as administrator for .msi files. You can, however, run the CMD prompt as Admin, then the following:

msiexec /a "Microsoft .NET Pet Shop 4.0.msi"

Another useful command to crack open a .msi installer file:

msiexec /a "Microsoft .NET Pet Shop 4.0.msi" /qb TARGETDIR=c:\temp

It might also help to do a:
runas /user:domain\user msiexec /a "Microsoft .NET Pet Shop 4.0.msi"

Other easier method is run cmd.exe as administrator and then launch .msi file