Access 2007 Runtime breaks Office 10

I installed Access 2007 Runtime for a test on a Win XP Pro system that
has Office 10. When I tried to run my previous application (.MDB)
it run under Access 2007 Runtime, instead of Office 10.

So I uninstalled Access 2007 Runtime, but it then I could not
run any Office 10 applications (Access, Excel, Word).

I ran the Office 10 installation CD and I expected the option
to "fix", but it didn't appear, even though the files existed
in Program Files. I ran a full installation and Word & Excel
seems to be working OK.

However, when I try to open my database via a Shortcut, an
error popup appears saying..
Windows cannot find '...xxx.mdb'. Make sure you typed the
name correctly, and then try again. To search for a file
click the Start button, then click Search.
even though the database does open normally.

If I open the .mdb file instead of the Shortcut, I see a popup
"Preparing to install" appear and then disappear.


So...
1. How do I fix the Error popup when opening via the Shortcut
2. Is there a way to have both Access 10 and Access 2007 Runtime
run on the same system? How do I do this?

Thanks...