Battery connection

Hi Lads,
Re - connected the battery after charging and it fired up 1st time (Lidle charger worked a treat)
but
on the screen I had 3 messages

System not programmed
Electrical system failure
Air bag system failure

Can these be reset?
Is it safe to drive in order to get them reset - about 7 miles?

Will this happen every time I disconnect the battery?

I take it that when reset all the electrics eg exterior door opening lever etc will be working again?
Thanks in advance
d

Turn the car off and start it again and they'll probably be gone.

Any more advice?
d

alt-control-delete eg: disconnect again, wait 10 mins then reconnect. I assume these error codes weren't there before you played with the battery?