AutoCAD LT - fatal error: (0x7ffc3ef70005)

[anityapimim]

[ The subject line of this post has been edited for clarity by @handjonathan Original: fatal error: (0x7ffc3ef70005) ]

[handjonathan]

Hi @anityapimim 

Thanks a lot for posting your question to the forums!  
 
Can you try the following solutions to resolve this behavior? If you can start AutoCAD after each step to test if the fix has worked that would be great. 

Install the latest updates for AutoCAD

Install the latest AutoCAD updates. Downloads are available in the Autodesk Account in the Product Updates section.
Note: For 2018 versions, make sure to install also the Autodesk License Service (x64) - 5.1.5 Hotfix.

Install the latest Windows updates

Make sure that your version of Windows has all the available updates provided by Microsoft.

Update the graphics cards drivers and configure your graphics settings

Check Autodesk Certified Graphics Hardware to see if the current video card installed in the machine is listed there.

If it is, install the video drivers mentioned in the list, otherwise, try installing the latest graphics driver available from the specific card manufacturer's website. 
If you are using a laptop with a dual graphics card, make sure to configure the software to use the high-performance graphics card. See How to configure Autodesk software to use high-performance graphics.

Consider also Starting AutoCAD without hardware video acceleration.

Update Microsoft .NET Framework

Check the Microsoft .NET Framework Download Page for the latest recommended version.
Download and install it to see if it helps with the crashing.

Install the Autodesk License Hotfix (versions 2014/2015)

Install the Autodesk Licensing Hotfix - POODLE SSL v3 vulnerability (CVE-2014-3566) to potentially resolve any errors when launching.

Confirm that the LAN and firewall settings are correct

1. Go to the Windows Control Panel and search for "Internet Options."
2. Select the "Connections tab."
3. Click "LAN Settings."
4. Deselect all options.
5. Go to Windows Firewall.
6. Be sure the necessary Autodesk URLs and protocols are white-listed. See Which URLs/Protocols need to be white listed for Autodesk subscription Licenses.

Reset AutoCAD to default

Use the following guide to reset AutoCAD to default settings: How to reset AutoCAD to defaults

If the problem persists, continue to troubleshoot using the solutions in AutoCAD randomly crashes or freezes.
Perform a Clean Uninstall to resolve an improper or corrupted installation. 

Windows Event Viewer 

Look for .dll file failure and consider repairing/reinstalling it.

Note. If the above steps don't work out it may be due to Windows operating system being corrupt and requires reimage of the windows OS.

Disable Digital Signature

Use the following guide to disable Digital Signature.

 
I look forward to hearing back from you with more information so we can help you as a community!