X300 (N1214UK) Please HELP!!! Display driver problem

[L1U_GT]

Hi there,

I have just bought a X300 6478-14G N1214UK (running on vista business) from a Lenovo dealer in London 4 days ago. The problem occured yesterday,

I was just checking my email, then suddenly the whole screen went black for 1 sec, and pop back again, had a little bug:'Display driver failed to response, but has recovered.'

Then worked fine till now... That was the first time (hope it will not happen again tho!!)

Has anyone encountered the same problem and how did you solve it?
Anyone could help me on this please? I have been stressing all day now, thinking it might gonna happen again.

By the way, is this a hardware problem or software???
What shall I do now?

Many thanks!!

Quan