Sir
I had a similar problem to you and was able to get a solution from HP IT forum (http://forums.itrc.hp.com).
It is likely that you are letting windows manage the amount of virtual memory (i.e. hard disk that is being used as memory) on your system - this is akin to saying keep growing until you've taken up all the space.
The solution is for you to set the amount of virtual memory yourself. I advise you to set it at twice the amount of physical memory you have.
You can do this through the control panel, System, Performance, Virtual Memory. You will get a lot of warnings not to do this and let 'Windows take of you'. I didn't have any issues.
Good luck.
Afam Edozie