[Koha] Running Koha 2.2.8

Hi all, I have successfully installed all necessary programs to run Koha 2.2.8 however whenever I click on the Koha shortcut on my desktop it reinstalls it again. When I click on 'run as.' I get: "Could not initialize installation. C: \Documents and Settings\Library\Desktop\Koha 2.2.8-W32-RO.EXE Access is denied" Even though the Koha has been installed twice and the computer has restarted. How do I run Koha without installing it again and getting the above message?? Help! Karina Tumon