Yes. I have a similar problem. It won't load up any of the files that are 100KB or greater, it reboots. I have an Athlon 1.3 GHz processor, 128 MEG redeon 9200 with over 750+ MEG of ram. With the exception of my processor I meet the recomended requirment.
I was pissed! cause i just got the game , got all geeked up, played till 3:00 am and couldn't load up the save the next day. That sucked.
This is what i have tried. I loaded up a smaller file, than reloaded a bigger file and by the third try i loaded up my latest.
This worked for me, but as u can imagine it is a bit of a pain. If anyone has a more efficient answer, by all means .... Thanks ahead.