Hi jostaf,
Please check the Task Manager for the related process it's referring to.
In addition, you can try the following basic troubleshooting steps :
> Enable the hidden Admin Account on Windows 7 ( Ref : http://www.howtogeek.com/howto/windows-vista/enable-the-hidden-adminis trator-account-on-windows-vista/ )
> Disable all Non-Microsoft Startup Services. (Ref : http://helpx.adobe.com/x-productkb/global/disable-startup-items-servic es-windows.html )
> Disable all the Antivirus softwares like CA, Norton,Mc Afee etc. temporarily from the computer.
Reboot and Install and check.
If the installation still encounters any errors we might need to troubleshoot with install logs : http://helpx.adobe.com/creative-suite/kb/troubleshoot-install-logs-cs5 -cs5.html
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