I'm about to install a brand new Motherboard on my desktop PC and I was wondering if there's any way to completely reinstall Windows 7 from scratch after completely deleting / reformatting my Hard Disk Drive. My main problem is that I don't have any disks (I do have the OS serial code though) or a backup (doing one now would be kinda pointless) and most of the information I've found online is sketchy at best. Perhaps I'm not looking in the right places, but I want to be completely sure of what I'm doing before fully committing.
Thanks in advance for any help!
Edit: The main reason I'm doing this is that since my last MoBo was installed, my computer has been randomly crashing (monitor goes dark and then the sound starts to distort after a few seconds).