Start - Control Panel - Network and Internet - Internet Options
سپس از تب Programs دکمه ی Make default را بزنید و سپس ok کنید
تمام شد
موفق باشید
راهنمای ماکروسافت :
To make Internet Explorer your default web browser
1.Open Internet Options by clicking the Start button , clicking Control Panel, clicking Network and Internet, and then clicking Internet Options.
2.Click the Programs tab, and then click Make default.
![تصویر](http://res1.windows.microsoft.com/resbox/en/Windows%207/Main/d/4/d4e7e5f5-522d-4561-9948-a92668cb3b0d/d4e7e5f5-522d-4561-9948-a92668cb3b0d.jpg)
http://bit.ly/9GgTSX
mbs