Hi
I used to have the same problems as you over and over again, it used to anoy me so much i felt like chucking my computer out the window but .......
This is a dramatic way to sove your problem, get a Apple Mac !! They never freeze or do anything stupid like windows do, i switched from Windows 2 years ago to Apple and i'm glad i did, there so much better and not frustraiting. I dont miss windows one single bit, you dont get freezing, you just get on with what you need to do! no worries what so ever, plus you don't get any viruses on macs what so ever, macs just don't let them in , you dont have to have any silly anti virus software to get rid of them, you dont have to do anything just sit back and enjoy your computer, how it should be, you may thing apple are expensive but there prices have dropped dramaticly this last year , i bought a aplle imac 5g for �1,300 now i could buy my computer for �600, there just hassel free and it will stop you getting anoyed, if you want you can run windows on macs but then you are open to viruses but you would then never get a freezing problem or anything else. or if you want most microsoft programs run on mac os anyway.
this may not solve your problem your having but it's just incase you consider it. i highly recomend it.