This ‘How To’ involves editing the Registry so first and foremost
Back It Up!
Secondly, if you are not familiar with editing the registry, its best you leave well alone.
When using IE, CTRL+ENTER is a very useful shortcut. It puts
'http://www' before the text in the address bar and '
.com' at the end.
So if I want to visit
http://www.microsoft.com all you have to do is press ALT+D (to highlight whatever is in the address bar), then type
Microsoft and press CTRL+ENTER.
Now for the but, maybe you want to change the extension from .com to something else.
Here’s How To:
Click on
Start then
Run and type
regedit to open the registry.
Navigate to the following key:
HKEY_CURRENT_USER\Software\Microsoft\Internet Explorer\Toolbar\QuickComplete.
Create a new string value and call it
QuickComplete .
Now right click on the value and type
http://www.%s.whatever. Obviously change the word whatever to what extension you prefer (net, com, co.uk etc)
Whatever is in the address bar will be inserted where the '%s' is.
This example would complete 'microsoft' to 'http://www.microsoft.whatever'.
Look at the screenshot below.
How To Change the CTRL + Enter funtion in I.E. 
