Hard drive failure

HP says my hard drive went out. I got a new one and need to transfer files from old one to disk or new one so I cna return on warranty. I cannot get old drive to load windows so dont know how to transfer. I get an error that says I can load in normal mode and it gives me a blue screen that says it’s dumping memory. if I load in safe mode then it has this long error message that just repeats after rebooting over and over again. I also want to find out how to completely erase my hard drive as I do not want to return it with my personal files on there. Any help is appreciated!!