Turns off without warning

Hello,
i aquired an acer Aspire One ZG5 net book from a friend. it has been exposed to negative temps. (Fahrenheit). When I power it on i get to a screen where it says
"Checking file system on C: the type of file system is fat32.
one of your disks needs to be checked for consistency." it also give me the option to skip it. either way (if i skip it or not) my computer promptly shuts off with no warning and does not restart. sometimes XP actually boots all the way but then it still shuts off. anywhere from 30 sec- to 3 min of uptime it will shut off..can anyone give me sum insight to what may be happinen? i dont think it is a xindows problem because if i enter the setup (F2) and let it sit in that mode it still shuts off. and i cant get it apart for sum reason..
thanks