To go on what Judy said:

You have 1.25GB RAM in your computer, but what is the HDD total space? You said you have ~15.5GB Free, but whats the total size?

And as for your question, the chances are, that's just what the program uses that is causing so many issues.


(Just as an example, I have 2GB RAM on my PC and it's currently set for a minimum size of 2046MB (2GB) and a max of 4092MB).