I installed Apache tomcate on Windows 7 OS. I just installed apache and make it available in eclipse. When i run any simple application on server it will say 404: page not f
It seems that your current user is not having rights on the tomcat folder.
I also faced the same problem and solved it by giving rights to the logged in user on the tomcat folder.
For your case :
Go to >>"C:\Program Files\Apache Software Foundation\Tomcat 7.0" folder Right Click>>Properties>>security Tab
provide required rights to currently logged in user.