Skip to main content
Participant
March 1, 2018
Question

Missing ACE.dll file

  • March 1, 2018
  • 3 replies
  • 6363 views

Acrobat won't open. Adobe tells me I have the most recent version of App. but "missing ACE.dll file" error keeps coming up preventing loading. Have downloaded App multiple times without any success. Can't seem to find a "fix-it" website that my security App will allow me to open.  Any ideas?

    3 replies

    Participant
    August 19, 2025

    the program can t start bacause ACE.dll is missing from your computer . try reinstalling the program to  fix this problem   PHOTOSHOP. EXE -SYSTEM ERROR

    Participant
    June 17, 2019

    This has not been answered and I have the same issue with a user.

    Participant
    June 17, 2019

    I had around 15 PC's at work come up with this error today. I had to repair each of the installations and that seemed to work. Wonder why this message showed up all of a sudden.

    Participant
    June 18, 2019

    Malwarebytes picked up the dll on our pc's.  I restored it, updated to latest db, re-scanned the affected dll and it came back clean.

    try67
    Community Expert
    Community Expert
    March 2, 2018

    What version of Acrobat? What's your OS version?

    Participant
    June 14, 2018

    Office 365

    John T Smith
    Community Expert
    Community Expert
    June 14, 2018

    IF that is a Microsoft problem, Search http://www.microsoft.com/en-us/default.aspx to find and re-install the C runtime