New
#710
Ixcacel,
Sorry, but you will not be able to do a repair install with a factory OEM installation.
However, you should be able to install the SP1 through Windows Updates if you have not already, or you could download the standalone windows6.1-KB976932-X64.exe SP1 installation file to install SP1 if it's not already installed at the Microsoft link below.
Download Details - Microsoft Download Center - Windows 7 and Windows Server 2008 R2 Service Pack 1 (KB976932)
You can check to see if you already have SP1 installed or not by typing winver in the Start Menu search box and press Enter. If you have SP1 installed, you'll see it listed in the "Version" line like below.