You should ask them to check this by replacing the PSU in their super-gaming machine with a 300w one and see what happens.
Yes I know
I should, but it's not worth arguing the point with someone who judging by some of their other replies is clearly a "hopeless case"
As for the BIOS, I'll let you know.

But why people don't just phone Medion and ask is something I don't understand!
Let's face it, if I/we want to access "our" equipment, then that's up-to us.
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Update:
As for the BIOS, I'll let you know. 
Well so far it does not look like the BIOS is locked as the but the instructions are a little on the vague side by saying access should only b needed for major alterations to the system.
Just to excited at the moment deciding where it's going to go, that I haven't even plugged it in "yet"
Not much room for expansion inside either (yes I looked) only space for one more HDD, but with the size of drives nowadays thats not so important.
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Just a update on the BIOS (for future reference) it was not locked and one of their techies said they do not lock BIOS's.
As there is another "very similar thread" on this Medion PC topic, I would suggest using that for any further discussions, of which there are one or two to follow.
http://forum.kitz.co.uk/index.php?topic=1632.new;topicseen#new