Fix 0x80240066 Microsoft Store error code when installing apps
Microsoft Store errors also occur due to corrupted system files. You should run SFC and DISM scans to repair the corrupted system files (if any). In addition to this, you should also check for Windows Update. Microsoft recommends users keep their systems always up to date in order to make their systems more secure than before and eliminate possible errors. We also suggest you check if the date and time are set correctly on your computer. If these basic fixes do not help, use the solutions provided below to fix the 0x80240066 Microsoft Store error code when installing apps. Let’s see all these fixes in detail.
1] Run Windows Store Apps Troubleshooter
Windows Store Apps Troubleshooter is developed to resolve Windows Store app issues. Because you are unable to install or update apps from Microsoft Store, running the Windows Store Apps Troubleshooter may resolve your problem.
2] Temporarily disable your antivirus
Sometimes, the problem occurs due to antivirus. If your antivirus is preventing Microsoft Store from installing the apps on your computer, you will not be able to install or update the apps. The simplest way to check this is to disable your antivirus temporarily and then install the app from Microsoft Store. You can enable your antivirus again.
3] Repair or reset Microsoft Store
Resetting Microsoft Store clears cache files. This action is helpful if the issue is occurring due to the corrupted Windows Store cache. Repair or reset the Microsoft Store app and see if you can install or update apps from it or not.
4] Uninstall the app using PowerShell
You need to uninstall the app using Remove-AppxPackage and then download the app from Microsoft Store. As described above, the error can occur with any app while updating or installing it from Microsoft Store. If you are unable to update pre-installed apps, you should uninstall them completely and then reinstall them. Do note that uninstalling a pre-installed app from Windows 11/10 Settings does not remove it completely from your computer. You have to execute a command in Windows PowerShell in order to remove it completely.
5] Toggle the Developer mode
By default, Windows 11/10 does not allow users to install apps from sources other than Microsoft Store. If you want to install apps from other sources, you can use PowerShell for the same. But before this, you have to enable the “Sideloaded apps” feature in Windows 10. On the other hand, in Windows 11, you just have to enable the Developer mode for that. If you are unable to install unsigned .Appx app package using PowerShell, we suggest you enable these options.
Sometimes, the Developer mode creates issues while installing apps from Microsoft Store. If these options are already enabled on your system, the error code 0x80240066 might be appearing due to this. Disable the Developer mode (in Windows 11) or switch from Sideloaded apps to Microsoft Store apps (in Windows 10) and try again. This should work.
6] Restore your system
We also suggest you restore your system and see if it helps. The System Restore tool will take your system to the previous working state by using the restore point created on your system. While performing this action, you can select the restore point as per the date on which it was created.
How do I fix Microsoft Store not reinstalling the Microsoft Store?
Microsoft Store installation error occurs due to several reasons. These causes include corrupted system files, corrupted Windows Store cache, unstable internet connection, incorrect date and time, etc. To fix Microsoft Store errors, run the appropriate troubleshooter, reset Windows Store cache, etc.
How do I fix apps not installing in Microsoft Store?
Check if you are running out of disk space or not. You should also check your internet connection and the date and time. If the problem still persists, disable your antivirus and firewall and try again. Repairing or resetting the Microsoft Store app works in most cases. Read next: Fix 0xC03F6603 Microsoft Store error in Windows.
