I installed AutoCad 2005 on my laptop and activated it without problem. I went to install and activate on my PC and everything went smoothly and I used the program that day. The next day I get Error 15.1.54 at bootup and then subsequently get Error 9.1.4 on subsequent boot-ups. I found an article on this exact error on support, but it does not provide suggestions on how to remedy this problem.
Here's the article description - "This error has occurred because the .dat file found in the Documents and Settings\All Users\Application Data\Autodesk\Software Licenses directory has been deleted or corrupted.
To prevent reactivation, files in the Documents and Settings\All Users\Application Data\Autodesk\Software Licenses directory should not be deleted or tampered with. Do not attempt to open and save the .dat file in a third-party application.
Also, setting a Windows folder security permission on the Software Licenses directory to deny read access to a user can also result in a 15.1.54 error."
I can see that the DAT file is there and i have not knowingly made any changes in the Autodesk program files. Does anyone have any advice on how to proceed? PLEASE?
The .dat file is there again because it's re-created every time the product is launched.
Your symptoms look like a clear case of the .dat file being deleted (.54 followed by .4), not corrupted. Do you have any software that rolls back file changes? Or boot manager or other software that loads before Windows starts?
It's safest not to delete .dat files. You can easily cause more trouble.