After reviewing the entire thread, I see there is a significant question that was never asked. I'm not ashamed to ask questions for clarification.
What are the distribution characteristics of this database? I saw mention of a front end and that implies a back end. But does every user have a private copy of the front end?
Sorry for late reply and Happy new year !
Yes every user have a private copy of the front end
All problems solved now
On server I put new ssd disk and windows 7 pro
Users have win10
If users updated win10 we have crash on openning forms of Access 2000
The solution was to add the (Access 2000) msaccess.exe as an exception in the
Data Execution Prevention (DEP).
Also I used the following for no hangs up :
Set these registry keys on the server: (Please look them up and check before putting these in place, don't blindly trust people who tell you to edit your registry! Including me!)
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\lanmanserver\parameters]
"EnableOplocks"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MRxSmb\Parameters]
"Oplocksdisabled"=dword:00000001
And this key on the client:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\MRxSmb\Parameters]
"Oplocksdisabled"=dword:00000001