What are AcWindows.dll.sig Error Messages?

General AcWindows.dll.sig Runtime Errors

AcWindows.dll.sig file errors often occur during the startup phase of DWG TrueView, but can also occur while the program is running. These types SIG errors are also known as “runtime errors” because they occur while DWG TrueView is running. Here are some of the most common AcWindows.dll.sig runtime errors:

• AcWindows.dll.sig could not be found.
• AcWindows.dll.sig error.
• AcWindows.dll.sig failed to load.
• Error loading AcWindows.dll.sig.
• Failed to register AcWindows.dll.sig / Cannot register AcWindows.dll.sig.
• Runtime Error - AcWindows.dll.sig.
• The file AcWindows.dll.sig is missing or corrupt.

Most SIG errors are due to missing or corrupt files. Your AcWindows.dll.sig file could be missing due to accidental deletion, uninstalled as a shared file of another program (shared with DWG TrueView), or deleted by a malware infection. Furthermore, AcWindows.dll.sig file corruption could be caused from a power outage when loading DWG TrueView, system crash while loading or saving AcWindows.dll.sig, bad sectors on your storage media (usually your primary hard drive), or malware infection. Thus, it’s critical to make sure your anti-virus is kept up-to-date and scanning regularly.

How to Fix AcWindows.dll.sig Errors in 3 Steps (Time to complete: ~5-15 minutes)

If you're encountering one of the error messages above, follow these troubleshooting steps to resolve your AcWindows.dll.sig issue. These troubleshooting steps are listed in the recommended order of execution.

To begin System Restore (Windows XP, Vista, 7, 8, and 10):

1. Hit the Windows Start button
2. When you see the search box, type "System Restore" and press "ENTER".
3. In the search results, find and click System Restore.
4. Please enter the administrator password (if applicable / prompted).
5. Follow the steps in the System Restore Wizard to choose a relevant restore point.
6. Restore your computer to that backup image.

If the Step 1 fails to resolve the AcWindows.dll.sig error, please proceed to the Step 2 below.

You can uninstall DWG TrueView software by following these instructions (Windows XP, Vista, 7, 8, and 10):

1. Hit the Windows Start button
2. In the search box, type "Uninstall" and press "ENTER".
3. In the search results, find and click "Add or Remove Programs"
4. Find the entry for DWG TrueView 2019 and click "Uninstall"
5. Follow the prompts for uninstallation.

After the software has been fully uninstalled, restart your PC and reinstall DWG TrueView software.

If this Step 2 fails as well, please proceed to the Step 3 below.

DWG TrueView 2019

Autodesk, Inc.

When the first two steps haven't solved your issue, it might be a good idea to run Windows Update. Many AcWindows.dll.sig error messages that are encountered can be contributed to an outdated Windows Operating System. To run Windows Update, please follow these easy steps:

1. Hit the Windows Start button
2. In the search box, type "Update" and press "ENTER".
3. In the Windows Update dialog box, click "Check for Updates" (or similar button depending on your Windows version)
4. If updates are available for download, click "Install Updates".
5. After the update is completed, restart your PC.

If Windows Update failed to resolve the AcWindows.dll.sig error message, please proceed to next step. Please note that this final step is recommended for advanced PC users only.

If Those Steps Fail: Download and Replace Your AcWindows.dll.sig File (Caution: Advanced)

If none of the previous three troubleshooting steps have resolved your issue, you can try a more aggressive approach (Note: Not recommended for amateur PC users) by downloading and replacing your appropriate AcWindows.dll.sig file version. We maintain a comprehensive database of 100% malware-free AcWindows.dll.sig files for every applicable version of DWG TrueView. Please follow the steps below to download and properly replace you file:

1. Locate your Windows operating system version in the list of below "Download AcWindows.dll.sig Files".
2. Click the appropriate "Download Now" button and download your Windows file version.
3. Copy this file to the appropriate DWG TrueView folder location:
   
   Windows 10: C:\Program Files\Autodesk\DWG TrueView 2019 - English\
   Windows 10: C:\Users\Tester\Downloads\Autodesk\DWGTrueView_2019_Enu_64bit\x64\dwgviewr\PF\Root\
   
4. Restart your computer.

If this final step has failed and you're still encountering the error, you're only remaining option is to do a clean installation of Windows 10.

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