When I upgraded to Windows 8 using an upgrade disc, I felt that Windows 8 was not quite performing to my expectations. Since I upgraded my power supply, I seemed to have multiple issues with it and reinstalled Windows 7. Then it seemed as if Windows 7 was not running as fast and stable as it had before. As of late, the PC would sometimes not detect an internet connection when booting. This has not been a problem when I tried reinstalling Windows 8.1. I had weird issues, like not being able to sign on to my Microsoft account and OneDrive sync issues. It seems as if my current Windows license does not like hardware upgrades, even if it's a power supply. My original power supply died, so now there's no point in trying to upgrade to Windows 8 without issues. Would a clean install of Windows 8.1 full version on my Windows 7-preinstalled PC be a cure-all solution for my recent issues given the changes in hardware? Would Windows 8.1 run much faster as a standalone OS rather than an upgrade?