New
#11
Ok mate the memtest it is the only one we will recommend as per my earlier post.
Now the RAM is important because in a nutshell the operating system is loaded into it at boot up and if nothing is being loaded then the system will not run because it has no basic info up and going to run programs from or from within itself ie sfc.
The hard drive if you cannot get the system up and running then you have either have got to get it going by looking at other components (and as mad as it may sound even the PSU is a major source of problems withing the system but more of that after the memtest has been done) or you have to hook the drive up to another machine and run tests on it via the other machines system.