Even a stable 64-bit tool encounters issues. Here are fixes for frequent errors when using :
The Nokia Software Recovery Tool (NSRT) is a desktop application designed by Microsoft Mobile (formerly Nokia) to help users reset, recover, or reinstall the operating system on their Lumia and feature phones. Nokia Software Recovery Tool 8-2 37 64 Bit
The official support forums were graveyards. “Discontinued,” they said. “Buy a new phone.” Even a stable 64-bit tool encounters issues