Okay well I do believe I have found the two main reasons why the client crashes. This is for REAL RS just for those who didn't notice the section
First off,
go to your run and put in
Then, I want you to go to your display tab(may say video? )
If it says you do not have full functionality or if it doesn't show your manufacturer then that means you are using the windows based driver. You need to go to the site of your computer( for me it was acer) go to the driver download section, select your operating system/model/etc.
Now go down to drivers, go to vga drivers(video graphic acceralators (no grammar nazis pl0x xD)
Now...download the one that goes with your computer. (for me it was an intel but yours may be different so you will have to figure that out on your own.
Install the video driver!
You shouldn't have anymore crashing problems.
Fix #2:
Minor fix really...but go to your java (control panel > java) go to settings, uncheck temporary files.