nvda

86c97c26 - Warn before installing or updating if connected as follower (#18481)

Warn before installing or updating if connected as follower (#18481) Closes #18455 Summary of the issue: When installing or updating NVDA, if the computer is being operated via NVDA Remote Access, the user will lose access because the secure copy of NVDA will not connect to unknown executables. Description of user facing changes: The launcher warns the user before installing or updating NVDA if Remote Access is connected as a follower, unless it is running as administrator, in which case we should not encounter UAC. NVDA warns the user before installing an update from the update check UI or via the exit dialog. In all cases, the user is discouraged from proceding, and the default response is to not continue with the installation. Description of developer facing changes: None Description of development approach: Check if connected as follower and not admin before installing from the launcher. Check if connected as follower in update checker and exit dialog (when the exit action is to update). All checks implemented as functions that return `True` if we should procede (there is no blocker, or the user has chosen to continue), or `False` if there is a blocker and the user has not chosen to continue. Functions with checks return early if the check function returns `False`. Testing strategy: Built launcher and tried to install while not connected, or connected as follower. Ran from source and manually envoked the installer GUI and attempted to install when connected as follower or not connected. Spoofed versions and attempted updating when connected as follower and not connected. Known issues with pull request: This problem is not unique to NVDA updates. If the user encounters a UAC prompt while connected as follower and is running portably or has not enabled Remote Access on secure screens, they will be stuck in the same way as this PR warns against. However, there is nothing we can do in these cases, as we cannot control whether UAC appears or not.