Hiyya taxman No you will just boot off the metest disk mate. It doesn't involve an OS.
Just make the bootable disk from Memtest86+ - Advanced Memory Diagnostic Tool
set the BIOS to boot from the optical drive and let it run. It does take some time and you need to run at least 7 passes or so - overnight perfect. What it does is just run through the test over and over but you should see some errors if there is any quite early on.
I just download the app to Downloads you can use where you like and then burn it to a CD or DVD. Power off power on > set the BIOS > stick the disk in > save the BIOS settings and > Enter it will run automatically.
Any steps you don't understand - ask - only dumb question is the one you don't ask