(Before you start, make sure you have all the data backed up in case of data lost and the blogger is not responsible for any harm if it may occur during the steps.)
Builds 9926, 10041, 10049, 10061, 10074, 10122, 10130 and later builds of Windows 10 now support a Recover / Rollback
feature that allows you to go back to the version of Windows installed on your
PC prior to installing the latest build of Windows 10. This is a onetime only
rollback to the previous build, but I've added a set of instruction on how to
"Trick" Windows 10 into rolling back to your original installation of
Windows XP, Vista, & or 8 / 8.1
Users who have a dual boot configuration or started with a clean
install of an earlier build of the Windows 10 Preview: The rollback feature
will restore the previous build you installed.
Note: If you have not installed a later build after
your initial upgrade to Windows 10 from Windows 7 or Windows 8.1, I'll show you
a trick on how to roll back to Windows 7 or Windows 8 / 8.1
The Trick:
Warning: For this trick to work you must rename the
C:\Windows.old file to for example: Win8.old or Win7.old You must rename the
Windows.old immediately before you install the next build for this to work.





