Uninstall Linux on both systems

Find a Windows system installation disk, set it to the boot mode, restart the computer, enter the repair mode, use the fixmbr command to repair the boot area, and then enter the installation mode, you can see partitions that cannot be recognized by windows. Delete the partitions and create new partitions. After the partition is created, exit the installation, remove the disc, and restart the computer. You can also use partition software such as PQ to process Linux partitions. Pay attention to data protection.

Note: GRUB boot can be used in this method. You have never tried other methods. The principle should be similar.