Program splash screen starts up and then closes (stand-alone) autocad 2013

Program splash screen starts up and then closes (stand-alone)
Applies to AutoCAD 2009, AutoCAD 2010, AutoCAD 2011, AutoCAD 2012, AutoCAD 2013, AutoCAD 2014, AutoCAD 2015, AutoCAD Architecture 2009, AutoCAD Architecture 2010, AutoCAD Architecture 2011, AutoCAD Architecture 2012, AutoCAD Architecture 2013, AutoCAD Architecture 2014, AutoCAD Architecture 2015, AutoCAD Civil 2009, …
When you restart the program after it becomes unresponsive and freezes your computer, the splash screen is displayed briefly and then closes down with no apparent error message.
Troubleshoot the problem using the following process:
Verify that the Licensing service is running. 
1.Access the Windows Run box.
2.Type Services.msc and press Enter.
3.Search for FLEXnet Licensing Service or FLEXnet Licensing Service 64.
4.Make sure the services are started and running.
(If they are disabled, they will prevent the program from starting.)
Inspect the contents of productname201xENUAdlm.log
1.Find this file at one of the following locations:
Windows XP:
C:Documents and SettingsAll UsersApplication DataAutodeskADLM

Vista/Windows 7/8:
2.The error will typically be:
Reason=Fatal error
OS=5.1.2600.Service Pack 2
AdlmIntError=38 [Error getting license usage and behavior]
Reason=Fatal error
OS=5.1.2600.Service Pack 3
VendorID=2 [ADLMACT]
VendorError=101 [The license cannot be accessed/loaded/opened]
These errors indicate that the ADLM trusted storage file was corrupted when the program crashed.
3.Rename the following file by adding a .bak extension at the end of the filename:
Windows XP:
C:Documents and SettingsAll UsersApplication DataFLEXnetadskflex_*

Vista/Windows 7/8:
Note: You may need to enable ‘Show hidden Files’ to see adskflex files mentioned above. Refer to the Microsoft topic,Show hidden files, for more information.
Warning: This file contains all activations for all 2010 and later products.  You will need to re-register all your products if this file is renamed/deleted.
4.Restart the program
It should automatically re-register and start up as expected. A new adskflex_* file will be created when you re-register your product.
Uninstall the product (if the previous process does not help)
If you are still having problems, licensing file could be corrupt.
1.Uninstall ALL Autodesk products on the machine.
2.Delete the file from step 3, above.
3.Delete the Productinfromation.pit file from the following location:
Windows XP:
C:Documents and settingsAll UsersApplication DataAutodeskADLMProductInformation.pit
Windows Vista/Windows 7:
4.Re-install the program.
See Also: