: Insufficient disk space or other pending system tasks can hold up the queue. How to Resolve a Stuck Installation
Windows defers replacing in-use system files until reboot. The PendingFileRenameOperations registry key tracks these operations. windows pending install
If it returns immediately → no pending. If it hangs → pending MSI operation. : Insufficient disk space or other pending system
This built-in tool identifies and automatically fixes common update database issues: How To Fix a Windows Update Pending Install - Quick Fix windows pending install