Registry Hack to Upgrade to Windows 10 After Getting Error 80240020. When the Windows 10 download finishes in the background (yes! User doesn’t know about it here), when checking ‘View update history’ in Windows Update, you might see an error with these full details when you open it, saying: ‘upgrade to Windows 10 Pro’ ‘installation status’ as ‘failed’ with error details as ‘code 80240020’.
READ: Microsoft has started pushing Windows 10 downloads to reserved systems
Fix Windows 10 Update Install Error 80240020
If you’ve encountered this error, don’t think the update download has been corrupted and know this: there is no problem with your update or reservation. If you got this error, you can install Windows 10 right away by changing a key in the registry.
1. Open the registry editor and navigate to
2. Create a new DWORD (32-bit) value, give it a name like Allow OS update and assign the value: 0x00000001.
SEE ALSO: Fix Windows 10 Installation ‘Something Happened’ Error
3. If the key (OSUpgrade) mentioned in step 1 does not exist for you, create it (right-click Windows Update > New > Key) and after that, follow step 2.
4. Exit the registry editor, open the desktop control panel, visit Windows Update and check for updates. The ‘Start button’ will now appear to upgrade to Windows 10.
Quickly upgrade to Windows 10 using the media creation tool