QUOTE : I have three Microsoft Windows 10 computers with 4GB of RAM and Intel processors: 1. The first was a free upgrade from Windows 7 to Windows 10 and is unusable. 2. The second is a Windows 10 computer with a Celeron processor and is unusable whenever background updates are in progress. 3. The third is a Windows 10 computer with a i3 processor and runs really slow when background updates are in progress. Both Windows 10 computers suffer from horrible lag in normal use.