Open some Web sites with IE9 but prompt for non-IE9 browsers

Some time ago we introduced to you a IE9 free gift year-end activities, as long as you use IE9 can get prizes. However, a user said, using IE9 to open the activity, but pop-up prompts that the browser is not IE9, only to upgrade to Windows 7 system and IE9 browser to participate in activities, can be clearly used is IE9 it?

In addition to the above situation, there are some sites in order to get a better browsing experience, shielding users of the lower version of IE browser access, but using IE9 browsing, or prompts your browser for outdated browsers, recommended to upgrade to IE9 in the visit site.

In both cases, this may be related to your browser settings, if you are using the Compatibility view, or adjust the browser mode and text mode, it may cause the site to identify errors.

The solution is also simple, with IE9 open the site, press the F12 key on the keyboard to open "developer Tools", the menu to adjust browser mode to Internet Explorer 9, text mode is also adjusted to Interent Explorer 9, and then test whether the page can be opened normally.