computers and cold temperatures[OT]

[CJ Tres]

IS it a bad thing to have a computer operating, say, in a garage during 
the cold winters?
I realize there is some discussion on running 24/7 due to heat/cold 
expansion/contractions but it this machine were running 24/7 during 
winter is there any reason to believe it would be detrimental to the comp?

Also wondering if anyone has any practical experience with storing 
CDs/DVDs under cold conditions.
One report I read was full of technical terms but ultimately stated that 
there isn't enough data to say one way or the other.