text: It sounds like your PC is being overwhelmed by one or all of the programs you're running.  It could be that one program is goofed up, or it could be that you need a little more RAM.  If it's an old computer, maybe it's time to get a new one.  It sounds like the easy way out, but considering how fast PC technology is evolving, there's no point in keeping a computer for more than 18 months... if you can afford it!