What a Chromebook can still open after ChromeOS updates stop

An Acer Chromebook R13 (CB5-312T) still turns on and still opens what is already on the machine after Google’s automatic-update date for that model. What stops on Google’s Auto Update policy page is the stream of automatic software and security updates for that hardware. August 2026 is the date Google lists for this model.

What remains on the machine, and what the update clock ends

• Still works: Google’s Chromebook Help pages say you can keep using a Chromebook after it stops getting automatic software and security updates, and the Auto Update policy page still describes secure mode that checks the system when the device starts.
• Stops working: Automatic software and security updates for the Acer Chromebook R13 (CB5-312T) after the August 2026 date on Google’s Auto Update policy page. Extended updates for asterisk-marked models also drop Android apps and the Play Store once you opt in.
• Needs subscription: Not applicable. This is a model end-of-support date, not a cancelled paid membership.
• Needs previous owner removed: Not applicable for the Auto Update Expiration date itself.
• Can work offline: Google’s offline Chromebook Help page describes email, notes, Drive documents, photos, saved pages, and offline-capable apps that can run without a network connection.
• Last checked: September 29, 2026. Auto Update policy, Update your Chromebook’s operating system, Use or upgrade an old Chromebook, Extended updates support, Open/save/delete files, Keep downloads from being deleted, Use your Chromebook offline, and Install & use Android apps on your Chromebook.

What sits on the Chromebook, and what sits in the Google account

The Files app on a Chromebook separates places that look similar until you need them later. Downloads is a temporary folder on the device hard drive. Google says the Chromebook may delete files there when space runs low. A permanent place such as My Drive in Google Drive is where Google tells you to drag files you want to keep. Play files under My files are Android app files when Play is available on that account.

The Google account is a different layer. Drive folders, Gmail, Keep notes, and Play purchases follow the account, not the plastic shell. Android apps you install from Play on a Chromebook are tied to the first account that signed into Play on that device, according to Google’s Android-apps Help page. Turning Play off erases Android app data and settings from the device. That is device-side app storage, not a promise that every website you ever opened stays usable forever.

So three buckets matter for this article. Local files live in Downloads, other folders on the drive, or removable storage you plugged in. Android apps live through Play on models that support them. Websites and web apps live in the browser session and on remote servers. Google’s end-of-update pages talk about the software and security update stream ending. They do not publish a list of which websites will refuse an older browser.

What changes when ChromeOS updates stop

This is not the same story as a cancelled membership. On dayanother.com, What a Peloton can still do after the membership ends is about a paid service that supplies classes on a bike screen. When that membership ends, Peloton’s terms say class access through the service ends. An Acer Chromebook R13 (CB5-312T) that has passed its Auto Update Expiration date is a different cut: Google’s published date for automatic updates on that model has passed. The machine is not described as refusing to power on because that date arrived.

Google’s update Help page is blunt about older hardware. Chromebooks eventually stop receiving new software updates when the hardware can no longer support the latest versions. You may see a message that the device will no longer receive software updates, that you can continue using the computer, and that you should consider upgrading. The “Use or upgrade an old Chromebook” page repeats the same split: you can keep using a machine that still works, and it will not get any more software updates. That page also says the device will not get automatic software and security updates anymore.

The Auto Update policy page adds two facts that matter after the last automatic update. First, automatic updates are how Google describes keeping the device more secure over time. Second, even after automatic updates stop, the Chromebook still has secure mode: it does a self-check when it starts and can repair itself if it finds tampering or corruption. Secure mode is not the same thing as continuing to receive new security fixes. Google’s own wording separates “still boots and self-checks” from “still receives automatic software and security updates.”

For models marked with an asterisk, including this R13 row, Google’s Extended updates support page explains the trade during the final years of support. Extended updates keep security, performance, and stability work going for eligible older platforms, but they do not include Android apps or the Google Play Store. Opting in removes on-device Android apps and Play access from that Chromebook. If you do not opt in, automatic updates do not continue on that extended path, while Android apps and Play can remain, with the note that app developers may stop supporting those devices over time. Either path ends at the published support date on the Auto Update policy table. For the Acer Chromebook R13 (CB5-312T), that listed date is August 2026.

What still opens, in Google’s own terms, is the computer you already have: files you saved, the browser at the version left on the device, and offline tasks Google documents for Chromebooks in general. What has stopped is the automatic update channel that delivered software and security improvements to that model.

What the owner can check

Open Google’s Auto Update policy page at https://support.google.com/chrome/a/answer/6220366. This article used that page on September 29, 2026. Find the Acer section, then the row for Chromebook R13 (CB5-312T). Read the “Automatic updates until” column. Google lists August 2026 for that model, with an asterisk that points to extended-updates eligibility rules on the same policy family of pages.

On the Chromebook itself, Google’s update Help page says to open Settings from the time menu, choose About ChromeOS, open Additional details, and read the Update schedule line that states how long the device will get automatic updates. That on-device date is what Google calls the most reliable way to gauge remaining official support for your unit. Match the marketing name and model codes on the bottom sticker or About screen to the product string on the policy table before you treat any other list as yours.

What to do before the support date

Move files you care about out of Downloads while the machine is still on its normal update path. Google’s files Help and the “Keep your downloaded files from being deleted” page both treat Downloads as temporary. Drag those files into a permanent folder such as My Drive, or save new downloads somewhere other than Downloads by changing the download location in Chrome settings. If you use an external drive, Google’s files page also describes saving there and ejecting the device when you finish.

If Android apps matter to you on an asterisk-marked model, read the Extended updates support page before you opt in. That page says opting in erases on-device Android apps and Play access on that Chromebook, and that the choice is not reversible. Google’s Android-apps Help page also says Play and those apps belong to the first account that set Play up on the device. None of those pages describe a special “export the whole Chromebook” button for end of support. They describe ordinary file moves and ordinary account-tied app data.

Do not treat an unofficial operating system install as a step in this article. Google’s Help pages used here cover staying on ChromeOS, checking the update schedule, moving files, and deciding whether extended updates fit your use.

One date that belongs to this model

On Google’s Auto Update policy page, opened September 29, 2026, the Acer Chromebook R13 (CB5-312T) is listed with automatic updates until August 2026, marked with an asterisk for extended-updates eligibility.

The harmful mistake

Treating an unsupported Chromebook as if it were still patched. Google’s Help pages say you may keep using the computer after automatic software and security updates stop. They do not say an expired model stays as current, or as safe, as a model that is still on the update schedule. Secure mode at boot is not a substitute for the security improvements Google ties to ongoing automatic updates.

Read next: What a Peloton can still do after the membership ends. What an iPhone can still do after Apple ends software support. What an Android phone can still run after security updates stop. Which desktop apps keep opening files after the subscription lapses.