Windows 10 Free Upgrade - What happens to Windows 7/8?
34039
What happens to the Windows 7 key when upgrading to Windows 8?
156288
Can I reinstall windows without reactivating it?
25951
Does upgrading alter partitions?
120337
Is it possible to get Windows 10 upgrade as an ISO image (to make a bootable install disk from)?
107419
How to use a retail Windows 7 Professional license key to upgrade an installed Windows 7 Home Premium machine
8171
Why is Windows 7 gone if I change my hard drive?
63022
Windows 10 thinks it's up to date, but it's not
6741
Windows 8 upgrade Recovery Disk
115354
Do I have to reinstall Windows 8 when upgrading my motherboard, cpu and memory, but not my HDD?
119819
Will “Erase Ubuntu16.10 and reinstall” keep my Win7 installation?
141295
Is a downgrade from Windows 8.1 Pro to Windows 7 Professional reversible?
145283
Can I install from a Windows 10 ISO or USB stick and still get the free upgrade?
71284
What are all the Windows 7/8/8.1 updates (KBs) I must skip to avoid Windows 10 upgrading -and nags-?
141667
Is Windows 10 OEM Home upgrade to Pro possible?
135027
Upgrading a motherboard and keeping old Windows 7 installation
88780
Is it possible to install Windows 7 alongside Ubuntu and windows 10 dualboot?
124724
How to upgrade from Windows 8.0 to 8.1 while keeping all the apps?