u mean shortcut to explorer? cuz if ur real explorer was moved ,system would crash(i wonder if it would even allow it to be moved)
He mean explorer.exe (system process), not Internet Explorer (browser).
Explorer.exe is process which runs icons, start bar etc etc...
If its keep restarting its problem with one of applications running. It may be some virus too...
Have you got anti-spyware and anti-virus program? What kind of (names)?