Known problem that no one wants to fix. There are some discussions here about when/why it self-unchecks. I use the following script
to make sure that is check in each session:
/b "SAVETIME.scr"
Add this to the end of your target in the desktop launch icon. Right click, properties...
There is a space after the Autocad exe" and the /b
This is the script:
SAVETIME
10
Create this in Notepad and save to yout Cad Support file. Change the 10 to any minute you want and I believe that you need to save a blank line after the number in the file.
Regards,
Charles Shade