How do I remove an old operating system?

Here’s the proper way to delete the Windows.old folder:

• Step 1: Click in Windows’ search field, type Cleanup, then click Disk Cleanup.
• Step 2: Click the “Clean up system files” button.
• Step 3: Wait a bit while Windows scans for files, then scroll down the list until you see “Previous Windows installation(s).”

How do I remove operating system from dual boot?

Follow these steps:

1. Click Start.
2. Type msconfig in the search box or open Run.
3. Go to Boot.
4. Select which Windows version you’d like to boot into directly.
5. Press Set as Default.
6. You can delete the earlier version by selecting it and then clicking Delete.
7. Click Apply.
8. Click OK.