A Warning Appears Only on the New COME Package
Treat the new warning as new information rather than a routine obstacle. Keep the previous working installation and protection settings. Record the offered release, source and exact message, then seek clarification through the appropriate channels before proceeding.
Identify the warning's source
A browser download prompt, an Android source-install permission and a Play Protect warning are different messages. Read the app or system name at the top and preserve the exact wording. The next step depends on what is being requested or blocked, not merely on whether a button labelled Continue appears.
Source-install permission concerns whether a particular browser or file manager may start installations. It does not certify the package. Play Protect can scan apps from outside Google Play and warn about potentially harmful behaviour. Google recommends keeping it enabled. Do not treat turning protection off as a standard installation step.

Compare the request with your task
If you intentionally opened a completed APK from your browser, an installation prompt is understandable, but you still need to recognise the product and source. If a different app unexpectedly asks to install software, stop and find out why. A permission request appearing after launch should also have a clear relationship to the feature you are using.
Do not enter passwords, OTPs, payment PINs or recovery codes into a warning page or send them to someone claiming to unlock a download. A download guide cannot grant access to Android's trusted controls, and a support message should not require these secrets to describe an error.
Investigate without weakening protection
Recheck the source and product identity, confirm that the transfer completed and compare the release with any existing installation. If Android reports a signing conflict, keep the existing app while asking the provider about the offered package. If Play Protect marks a package harmful or prevents installation, preserve the warning and use the provider's legitimate support route.
For a work-managed device, installation restrictions can be deliberate organisational controls. Contact the administrator rather than changing management settings or using a personal workaround.
Describe the result precisely
A useful private help request includes the device model, Android version, stage, exact warning and source address. Remove unrelated account balances and personal notifications from screenshots before sharing. This gives the recipient enough context to distinguish a blocked package from an incomplete transfer without exposing authentication information.
A related situation to recognise
A source prompt names the browser or file manager that wants to start an installation. Play Protect evaluates apps and can raise a security warning or block. Treat them as distinct decisions. Source permission and file trust are separate decisions; read a security warning even when the transfer completed. Preserve the warning wording and investigate through the product and device's legitimate channels.
Questions about this task
Is source permission a security approval?
No. It allows a source application to start installation and does not endorse the package.
What if a tutorial says to switch protection off?
Keep protection enabled and investigate the warning through the device and product's legitimate help routes.
Choose the next step
If this task is complete, continue from the stage you reached. If the symptom remains, keep the exact message and use the related guide only when it addresses that different question.
Check COME Preferences After a Successful Update