Error 21 causes installation failure

Last updated on Sep 17, 2025

Learn how to resolve error code 21 "System requirements not met" during Adobe app installation.

Error code 21 indicates that your device doesn't meet the minimum system requirements needed to install or run the app. This could be due to outdated hardware, an unsupported operating system version, or insufficient system resources.

System doesn't meet the minimum technical requirements

Upgrade your system to meet the minimum requirements for installing the apps. Learn more about the minimum technical  requirements for installing Adobe apps.