How to Fix Browser or OS No Longer Supported Error in Adobe Acrobat
Question details
Users are unable to sign in to Adobe Acrobat due to an unsupported browser or operating system error message.
- Product
- Adobe Acrobat Pro DC 2015 Classic / Continuous Track
- Device & OS
- Windows 10
- Scenario
- Attempting to sign in to Adobe Acrobat on a Windows 10 computer.
- Observed behavior
- An "Update Required" prompt appears, incorrectly stating that the browser or operating system is no longer supported, which prevents the user from successfully signing in.
Ensure you have an active internet connection and administrative privileges on your Windows PC, as you may need to install system updates or modify default app settings.
Update Adobe Acrobat and Windows OS
Installing the latest updates for both Windows and Adobe Acrobat is the most reliable way to resolve underlying software compatibility issues.
Adobe has released specific patches for the Continuous track that address the embedded Internet Explorer 11 emulation issues triggering this error.
Go to Settings > Update & Security > Windows Update. Click Check for updates and install any pending system updates.
If you can open the application without signing in, go to Help > Check for Updates. Alternatively, manually download and install the Acrobat 21.005.20060 Optional Update (or newer) directly from Adobe's official release notes page.
Change the Default Browser to Microsoft Edge
Setting Microsoft Edge as your default system browser can bypass outdated browser dependencies that cause the sign-in screen to fail.
Verify Internet Explorer Compatibility Settings
Preventing Internet Explorer from running intranet sites in older Compatibility View modes can stop Acrobat from defaulting to an unsupported IE7 emulation.
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Frequently Asked Questions
Why is Adobe Acrobat saying my OS is not supported on Windows 10?
This error generally occurs because the Acrobat sign-in window relies on embedded browser components. If Acrobat forces outdated Internet Explorer emulation (like IE7 mode), the sign-in portal detects an unsupported browser version and blocks access.
Will changing my default browser to Google Chrome fix this Acrobat issue?
While changing the default browser can help, setting Microsoft Edge as the default is specifically recommended for this Windows 10 issue due to its native OS integration, which better resolves the underlying embedded browser conflicts.
What specific Adobe update fixes the browser unsupported error?
For users on the Acrobat Continuous track, Adobe released the 21.005.20060 Optional Update specifically to address Issue 4336133, which prevents IE11 from enforcing the problematic IE7 emulation mode during sign-in.
