Here a few things to try, I do tech support for an ISP and these steps resolve issues like this about 80% of the time.
In IE, click on the Tools menu, click Internet Options. This will open the Internet Options dialog. Click on Delete Files, when the Delete Files box comes up, put a check mark in delete all offline content and click OK. Now back at the Internet Options dialog, click on the settings button beside the Delete Files button to open up the settings window. On the settings window Click View Files to open up the Temporary Internet Files folder. Click on the Edit menu and click Select All. Click on the File Menu, and click Delete. Close the window which will take you back to the Settings window, click OK to close it and go back to Internet Options. Click on clear history and click on Yes when asked.
Now click on the connections tab, click on on the Setup button to run through the Internet Connection Wizard.
If this does not fix the problem, then try the IE Repair tool. Make sure you close IE. Click on Start, then settings, then Control Pannel. Inside the control panel, click on Add/Remove programs. Locate a listing that will look something like 'Internet Explored x.x and Internet Tools' where the x.x will be the version of IE you are using. Click one time on this item to make sure it is highlighted and click on the Add/Remove below the list. A box will come up with three options, select the option for repair and click OK. This will ask you about doing this, select Yes. It will run for a few minutes and then ask you about re-starting, go aheard and let it re-start.
This will fix alot of problems, including sometimes the issue your seeing though not always.
