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If you are using Windows 10 or 11, the operating system is designed to block unsigned or legacy drivers. The drivers for the BlackBerry 9900 are old. Before connecting your phone, you may need to restart your PC into "Advanced Startup" mode to disable Driver Signature Enforcement. This allows the PC to recognize the BlackBerry Bootloader.
Years of cache and orphaned databases can clog the device. A fresh autoloader installation restores the original speed. bb 9900 autoloader download
The BlackBerry Bold 9900 has two variants: If you are using Windows 10 or 11,