Internet Explorer cannot display the webpage
  
   Most likely causes:
You are not connected to the Internet.
The website is encountering problems.
There might be a typing error in the address.

   What you can try:
     Diagnose Connection Problems  

     More information

This problem can be caused by a variety of issues, including:

Internet connectivity has been lost.
The website is temporarily unavailable.
The Domain Name Server (DNS) is not reachable.
The Domain Name Server (DNS) does not have a listing for the website's domain.
If this is an HTTPS (secure) address, click Tools, click Internet Options, click Advanced, and check to be sure the SSL and TLS protocols are enabled under the security section.

For offline users

You can still view subscribed feeds and some recently viewed webpages.
To view subscribed feeds

Click the Favorites Center button , click Feeds, and then click the feed you want to view.

To view recently visited webpages (might not work on all pages)

Click Tools , and then click Work Offline.
Click the Favorites Center button , click History, and then click the page you want to view.

每次都是这样，偶尔已经打开了，可是2秒钟之后就变成  Internet Explorer cannot display the webpage
来论坛就没有问题。我在加拿大。不知道其他地方的姐妹有没有这种问题。好几天了，郁闷死了。。。
请斑竹查查怎么回事，谢谢