Have you noticed it? After installing Windows 10 Preview build 9926, you can see a new entry with the name Windows Rollback on the boot menu, don’t select it without knowing about it. It’s there to uninstall current Windows TP, to delete or remove that uninstall option from the boot menu, follow the steps below.

Delete or remove the Windows Rollback option from the boot menu

I. In the search box, type cmd, right click on the command prompt entry in the search results and select ‘Run as administrator’

Read: How to Run Cmd as Administrator in Windows 8/8.1

2. Type bcdedit /timeout 0 and press enter

Note: To get the rollback boot option back, in place of ‘0’ in the above command enter any number between 1 and 30.

Windows Rollback boot entry added with Windows 10 build 9926

II.

Other ways to delete the Windows Rollback boot option are:

1. Perform a refresh or reset on the Preview build.

2. Run the disk cleanup tool, select ‘Previous Windows Installations’ to remove  the Windows. old folder or you can use the CCleaner tool too for that.

3. Add  a new user account

Or

Though not suggested by Microsoft, try this at your own risk.

  • Open Run command, type msconfig and press enter
  • On the System configuration dialog window, click on ‘Boot ‘tab and select ‘Windows Rollback (Windows)’ and click ‘delete’ button.

Suggestion: If you don’t do anything when the boot screen appears, your system will automatically boot into Windows 10, no harm done.

Problems with the rollback option

If you’ve accidentally selected the uninstall/rollback option, you need to know the password of your previous OS: could be of build 9879 or Windows 8.1 or Windows 7 SP1 if you’ve upgraded through Windows Update.

“Account information is not saved from Windows 10 Technical Preview.  Instead, the accounts from your previous OS will be put back in its entirety.”

If you’ve upgraded from Windows 8.1 to Windows 10 Preview, “Any built-in, modern apps from Windows 8.1 that were updated or replaced for Technical Preview will not work after you Uninstall back to Windows 8.1. You can repair these apps by uninstalling the app manually and then re-downloading them from the Windows Store.”.