After software update of Xactimate, unable to open program related to file extension xm8.app.help.dll

Michael Majure 0 Reputation points
2026-09-17T16:35:38.08+00:00

Ran a system update for Xactimate. The program is not starting up. Nothing happen at all. Running Windows 11. Received a windows notification, disappeared before I could capture all details. However, it appears to somehow relate to a permission error on a file extension XM8.APP.HELP.DLL. Please advise.

Windows for home | Windows 11 | Security and privacy
0 comments

2 answers

Sort by: Oldest
Most helpful Newest Oldest
  1. David-M 126.8K Reputation points Independent Advisor
    2026-09-17T17:16:39.73+00:00

    Hi. I'm David, and I'm happy to help you.

    This issue sounds like Windows Ransomware Protection (Controlled Folder Access) is blocking Xactimate from writing or registering files during an update.

    Open "Windows Security > Virus & threat protection > Protection history". Look specifically for an entry stating "Controlled folder access blocked". If you find anything, can you send a screenshot? Use the shortcut "Windows + Shift + S" to use the screenshot tool.

    Could you also share your Xactimate installation directory (e.g., C:\Program Files\...)?

    If you have a third-party antivirus, can you tell me which one?

    Looking forward to your reply.

    Was this answer helpful?

  2. Michael Majure 0 Reputation points
    2026-09-17T17:24:09.5633333+00:00

    Was able to restore access to Xactimate by changing Windows11 setting for Windows Security>Apps & Browser Control>Smart Control > OFF.

    Was this answer helpful?

Your answer

Answers can be marked as 'Accepted' by the question author and 'Recommended' by moderators, which helps users know the answer solved the author's problem.