Do I need to need to deactivate Windows before re-installing
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Windows Activation FAQ: How do language, version, 64-bit or 32-bit, and source affect ability to install and transfer Windows licenses?
107978
Is it safe to remove the extra local disk after upgrading to Windows 10 version 1803?
151896
How to log in to WIndows after disabling all services?
41488
Will a clean install of Windows 8 recognize an OEM license/product key?
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Erase Windows Vista to Install Ubuntu
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Remove windows XP after installing Ubuntu
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Install Windows 7 without a DVD drive
18655
How to reinstall Windows 10 on new hard disk
71031
Can I erase my preinstalled Windows and use the serial number elsewhere?
136074
XP Activation and Dual Booting
125237
What's the best way to completely remove everything from a computer, without re-installing?
113904
Clean install Windows 10
26383
How to install Windows 7 after Ubuntu and dual boot?
16904
Did replacing Windows with Ubuntu completely remove Windows?
28420
Move existing Windows 7 or 10 installation to new computer?
55315
Do I keep my Windows installation if I install Ubuntu with Wubi, the Windows installer?
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how to restore windows 7 to a know working state every time it boots