error on adding program to my windows 7

[jerapah]

I am using a Windows 7 Operating System. And whenever I try to install new program I get this weird error message. The message says that "You don't have the proper permission to access this program". I don't understand it.
Any solution please.

[EINSTEIN_007]

In Windows 7, go to Control Panel>All Control Panel Items>Network and Sharing Center. Click on "Change advanced sharing settings". You don't want to use Homegroup unless you have all Windows 7 machines. If you do and you want to use Homegroup, see Windows 7's Help & Support. Otherwise, in the Advanced Sharing:

Turn ON network discovery
Turn ON file and printer sharing
Turn ON sharing in the Public folder sharing section
Turn ON password protected sharing

More information can be found here.