By Tomas Dabasinskas, on November 19th, 2010, 
As I've wrote before, at TechEd Europe 2010 I've got brand new HTC Mozart with Windows Phone 7 OS. After using the phone for the couple of days, I've noticed a strange thing: clicking search button on the phone opens browser with desktop version of Bing, which isn't very comfortable to use. I've tried couple of other windows phones (HTC HD7 and LG E900 Optimus 7) and I remember that the same button on those phones opened Bing application instead of the WEB page (as it is for me). After doing some research, I've found out what the problem was.
One of the first things I've done after I've turned on my new phone was going through all the settings and customizing them. There are section called "Region and language" in the settings page. Since I live in Lithuania, I change every setting in this section to match my country. And that was the problem. The last setting on this section is "Browser & search language". I guess what Windows Phone 7 OS does when I click search button is reading this setting and then, if the Bing app is available in that language, it opens the app, otherwise it opens the Bing web page in selected language. Since the application isn't available in Lithuania language yet, I've been ending up with WEB page. So, the solution of getting the search button to open that nice application by default was to change "Browser & search language" to "English (United States)" (some other languages/countries, for example "English (United Kingdom)" that already officially support WP7 would be good too).
So I hope this little tip might be useful for someone who doesn't live in the countries, where Windows Phone 7 is officially supported.
Please help me. Disk cleanup is missing from my computer and I saw your comment to pres WIN + something else and exe. Anyway, I cannot find the WIN button on my keyboard. Please help me. My email is oteromom@sbcglobal.net.
Thank you, Terri
Well that's a bit off topic here
Anyhow, you can find Disk Cleanup utility at "C:\Windows\System32\cleanmgr.exe"
Thank you for this info. Looking forward to next one.
Oh such a fu***** feature! I had the same problem. Thanks for tip. It's OK now.
Thanks. I have same problem
Tomas, this was a very useful tip. Many thanks for posting it!
Hi, I'm from Italy (that it is supposed to be supported) but the search button is acting the way you described anyway.
I reverted all the regional settings to "English (United States)" with no luck
The search button still open the bing web page...
Oh, thx.
Biiig TNX!
To someone like Andrea... - for me it required a restart to see the changes. Hope this helps!
Thanks alot!!!, ive change the Browse and search language to English UK and it worked.
Lithuania is just too far Thomas. If it wasn't for that, I will be running to you now a give you a big kiss, buy a man as I am. Thank you very much for the solution, couldn't even get it on windowsphone.com!
Meant being a man as I am...
Hello, thanks!!!
thanks, just the thing I was looking for!
I am grategul for your article.