Program just shut down

[ZFact]

Hi all;

 

Just bought a new computer recently:-

 

Hardware

Quadro FX 540

2gig ram

AMD ATHLON 64 X2 DUAL CORE PROCESSORS 4200+

450 POWER PACK

 

Software

Cinema 4D

 

I was running a render yesterday and I left the render running

while I went out for an hour... when I came back in the program

had just closed... Iv no idea why.

 

Can anyone help?

 

Thanks

Z