Oracle 11g setup closes without errors on pre-requisite check
I assume you are using the 64 bit version of Oracle to install.  

I assume you have Windows 7 x64 - Professional, Enterprise, or Ultimate    edition   

In the case of unusual errors it would not be impossible for something silly like the language pack in use on Windows to be the cause. Try starting with a new Windows install that has not been customized or has had any other Oracle products installed or removed

Check the    install logs.  With all the versions and folder name changes I am not  100% sure where but you should look in the c:/Windows/oracle or in  the install folder if located on hard disk