The BlackBerry Bold 9790 runs on the legacy BlackBerry OS (specifically OS 7.1). This is not Android, BB10, or iOS. The infrastructure for these devices has changed significantly over the last decade.
Newer versions of BlackBerry 7.1 OS often include memory management improvements. Firmware Change Update on BLACKBERRY 9790 Bold
During installation, the BlackBerry installer writes to the Windows registry. Security software can falsely flag the radio stack update as a threat and interrupt it. Important Note: The BlackBerry Bold 9790 runs on
Follow the steps above using Loader.exe to install the new firmware onto the blank device. Important Tips Firmware Change Update on BLACKBERRY 9790 Bold