Open regedit and goto:
Code:
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\Current Version\explorer\MyComputer\NameSpace
Under this key, you’ll see a few keys having name in following format:
Code:
{xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx}
These keys represents the items which you see in My Computer. If you select any key, you can see its description in right-side pane.
So delete the key related to SE File Manager and it’ll remove it from My Computer window.
Taken from
here.