iTunes problem

Dear All
Greetings, I am facing a problem and I am unable to solve, the problem is described as follows;
iTunes cannot connect to the internet from my laptop although a person on the same network is able to do so from his lap top. As such I believe the problem is within my laptop.
I uninstall iTunes and I cleaned my Registry from All related keys and file of:
1. ITunes
2. Apple e Computers
3. Quick time
4. Iphone
5. Bonjour
I also deleted my iTune file from My music, deleted iTune file from Programs.
I downloaded the latest iTunes from Apple website and install fresh copy and I even changed the directory location from Programs to C:\iTunes (when started I receive an error message telling me itune did not install properly) so I uninstall from C:\iTunes and reinstall in C:Programe files\iTunes (Default path) now I cannot even run itune after fresh install (Error 7 try to reinstall iTunes…hahah)

Any Suggestion will be appreciated
Ahmed

sorry the hahaha is me laughing at myself

managed to reinstall, but the earlier problem still there. I cant connect to iTune store online