Windows Evaluation -> Full version- do I have to rebuild the OS?
400
Can you help me with my software licensing issue?
124724
How to upgrade from Windows 8.0 to 8.1 while keeping all the apps?
63514
How do I decide what version of Ubuntu to install?
102627
Can the Windows 8.1 Preview be upgraded to the final release?
21700
Is there a way to establish what version a Windows 7 product key is?
104707
Downgrade Windows 7 Ultimate to Home Premium without a clean install
139149
How to reinstall Windows 7 using in-place upgrade when the system is unbootable?
105875
Need to upgrade Windows XP to Windows 7 without losing data
21952
Windows Activation FAQ: How do language, version, 64-bit or 32-bit, and source affect ability to install and transfer Windows licenses?
156288
Can I reinstall windows without reactivating it?
36355
I removed Boot Camp the hard way, but then I got a Windows error anyway. Should I be concerned?
46186
How can I reinstall Windows 10's calculator app?
14820
Is a clean install better than upgrading?
63022
Windows 10 thinks it's up to date, but it's not
137357
Returning from Dual-boot to just Windows
141295
Is a downgrade from Windows 8.1 Pro to Windows 7 Professional reversible?
128253
do i need to reinstall all my softwares after upgrading ubuntu 12.10 to 13.04?