I would like to share the resolution that worked for me and hope it will work for all the users too :-)
1. Open up Internet Explorer
2. Click Tools –> Internet Options
3. Click the Connections tab
4. Click LAN settings
5. Check “Use a proxy server for your LAN (These settings will not apply to dial-up or VPN connections).”
6. Enter 127.0.0.1 for the address
7. Click Advanced
8. In the Exceptions type: *.*
9. Click Ok
You should now be able to browse to a SharePoint site, click an Office document and have it successfully open in your Office 2010 client.
If you have any queries/questions regarding the above mentioned info then please let me know, Thanks...I would be more than happy to help you as well as resolves your issues :-)