Keyboard shortcut for Delete - Is there such a thing and can I disable it?

I did a quick look through both Help and this forum, but didn’t see an answer.

Working in 2007
The Pres. of my company accidentally deleted a “record” while trying to add
notes. He doesn’t know how it happened.

While working in an order form that is built from 3 tables: Cust Info, Order
Info, Warranty Info, he used “Ctrl;” to auto enter date and just kept on
typing. Again, he doesn’t really know what else he did, but he said he never
got a warning that a record was going to be deleted. We have tried to
replicate the key stroke, but to no luck. Should I put this down to a fluke?

Here is the other odd thing, it did NOT delete the entire record (from all
three tables) it only deleted Order Info and Warranty Info, leaving Cust
Info. How is that possible? There is a command button on the form that will
delete a record, but it gives an audible warning before and it DOES delete
all info from all tables. This leads me to believe that he didn’t
accidentally use it.

I know one should not delete records, but I didn’t build the DB and I’m not
in charge of it, so it is out of my control.

Any help is greatly appreciated.