Engine failure!

I am in the process of adding pictures from the Oxford seminar I just attended, but I got the answer "engine failure" when I tried to save a picture in Nikon Capture NX! I have been gathering material concerning a new lap top, and will decide any day now which one to buy. It will probably ease the situation. I need a computer with a minimum of 1 GB RAM but have found one with 2 GB. I have an external hard disk with 250 GB, but want the laptop to have at least 120 GB. I anyone who reads this has any suggestion, please use the Comment function to let me know which computer to buy.