[AlicePhoebe]

You have 30 days to rollback to your previous OS, once you have installed W10, my colleague told me, and i searchded it in Google, still can't be sure, someone say yes, someone not,  is that true? If i do not satisfied or there is something wrong with windows 10, how to go back for previous OS?

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When you perform an in-place upgrade of Windows, setup saves old Windows files in a folder called Windows.old.

In Windows 8, if it fell below 10% free disk space, or after 28 days, the old Windows files would be removed by a system task. However, the system task could be delayed or deleted to keep the files longer. There will probably be a similar scenario with Windows 10.

[admin]

When you perform an in-place upgrade of Windows, setup saves old Windows files in a folder called Windows.old.

In Windows 8, if it fell below 10% free disk space, or after 28 days, the old Windows files would be removed by a system task. However, the system task could be delayed or deleted to keep the files longer. There will probably be a similar scenario with Windows 10.

[SleepyDude]

And to be safe create a full image backup of you system to an external hard drive before upgrading.

 

http://www.geekstogo...t-imaging-tool/