Error 191 ... again in 2026 (Creative Cloud for Enterprise)

Hi @cipher_nemo,

Thanks for reaching out, and I’m sorry to hear about the issue you are facing.

Error 191 generally indicates that Creative Cloud is unable to complete an update operation due to a system-level or service-level issue, even if the application is already on the latest version. In Windows environments, this is often related to background services, permissions, or security policies blocking Adobe components.

Since this is occurring across multiple fresh Windows 11 deployments, this does not appear to be an isolated installation issue and will require deeper investigation.

To move this forward, we recommend the following steps:

• Ensure that all required Adobe services are running:

  • Adobe Update Service

  • Adobe Genuine Monitor Service

  • Adobe Genuine Software Integrity Service

• Temporarily test on one affected machine with endpoint protection or application control disabled, to rule out blocking by security policies.

• Run the Adobe Creative Cloud Cleaner Tool to completely remove Creative Cloud, reboot the machine, and reinstall using the latest enterprise installer. Please refer to the following document:
  https://adobe.ly/3YQUTGg

Additionally, please confirm whether all these machines are being deployed from the same task sequence or system image. If so, we recommend reviewing it to ensure that no steps are impacting Adobe services or components.

Please also share the PDApp, DLM, and ACC logs from one affected machine so we can review them and assist you further. You can find instructions for locating these logs here:
https://adobe.ly/3LSCWEp

For the ACC log specifically, please check this location:
C:\Users<USERNAME>\AppData\Local\Temp\CreativeCloud

I hope this helps. Please let us know if you need any further assistance.