ITunes is not connecting to the internet on one of my desktops. I'm unable to go into the store or run the update. If I delete it

I'm running Windows 7 Pro. 3.7 Quad IV processor, Every other program on this computer connects to the internet just fine. Sometimes ITunes freezes up for 20-30 seconds. I can go in my library & do just about anything except get in the ITunes store or do an update. I can delete the program & reinstall. Also, will I lose my purchased songs? Any suggestions?

Thank you kindly!