Regarding File Explorer loading slowly, I suggest you rebuild the system index. Win + Q to open the search box, enter "index options" and press Enter to open "Index Options", click "Advanced” > “Rebuild”.
Reindexing may take a long time, please be patient or check again in a few days, and try to keep your computer turned on during this time.
Additionally, you may in-place upgrade the system by the steps below.
- Please rest assured that the in-place upgrade the system will theoretically not affect your data and applications (you need to choose to keep files and applications in the next steps), just update all the system files are the latest.
- If you have important data, you may make additional backups to prevent accidental loss of your data. Also make sure there is enough free space in the system partition, at least 40GB.
- Download Windows 11 ISO file Visit Download Windows 11 (microsoft.com) and click "Download Now" under “Create Windows 11 Installation Media” to download MCT (Media Creation Tool).
Then run the program, select "Create installation media (USB flash drive, DVD or ISO file) for another PC”, and then choose Language, Version, Architecture (if you are not sure about these, choose "Use the recommended options for this PC"), then select "ISO file" in the "Select Media to Use" interface, and then a Windows ISO file will be downloaded to your disk (about 4-5GB in size, it is recommended that you choose a non-system disk).
- In-place upgrade the system After the download is completed, double-click the ISO file, double-click to run "setup.exe" in the open file explorer, and select "Change how Windows Installer downloads updates" > "Download updates, drivers and optional features", Select "Keep personal files and apps" after accepting the terms of the agreement, then click "Next" > "Install". Then the system will reboot a few times, and then enter the welcome screen.