If you enable "Navigation Pane" in Windows 7 Explorer, it shows following 5 items in the pane:
Network
Libraries
Favorites
Computer
Homegroup
For your convenience counting this post, we have covered How to
Remove or
Disable these navigation panes
NetworkLibrariesFavoritesHomegroupThis tutorial will help you in removing "Computer" item from the Navigation pane as shown in following screenshot:

Simply follow these simple steps:
1. Type
regedit in RUN or startmenu search box and press Enter. It'll open Registry Editor.
2. Now go to following key:
HKEY_CLASSES_ROOT\CLSID\{20D04FE0-3AEA-1069-A2D8-08002B30309D}\ShellFolder
3. Now you'll need to create a new DWORD value "
Attributes" in right-side section. But Windows will not allow you to create it as you won't have proper permissions.
To get permissions, first right-click on "
ShellFolder" key and select "
Permissions".

It'll open a new window. Select "
Administrators" in user list and check "
Allow" box given for "
Full Control" permission.

Click on OK button to apply the changes.
4. Now create a new DWORD value "
Attributes" in right-side section and set its value to
b094010c 5. That's it. Log off or restart your system and "Computer" will no longer present in Explorer window.
NOTE: If you want to restore "Computer" in Navigation pane, simply delete "
Attributes" DWORD created in step 4.