Win7 fails to open Cad software. What should I do if I lose ac1st16.dll?

Cad is a popular design aid, and there are no fewer users. However, when a user opens the Cad software under the Win7 system, an error message is displayed: The program cannot be started, and the computer loses ac1st16.dll, causing the Cad program to fail to start. How to deal with this problem?

Method

1. Right click on my computer ------Properties ------- Advanced System Settings ------ Environment Variables;

2, adding a & ldquo; Autocad & rdquo; system variables, the variable value: C: \\ Program Files (x86) \\ Common Files;

3, modified Path value, the variable value :SystemRoot%\\system32;%SystemRoot%;%SystemRoot%\\System32\\Wbem;%SYSTEMROOT%\\System32\\WindowsPowerShell\\v1.0\\;C:\\Program Files (x86)\\Microsoft SQL Server\\100\\Tools\\Binn\\ ; C: \\ Program Files (x86) \\ Microsoft SQL Server \\ 100 \\ DTS \\ Binn \\; C: \\ Program Files (x86) \\ Common Files \\ Autodesk Shared \\

4, the amendment is successful, Open the CAD directly without restarting the computer, success!

The above will cause the Win7 system to open Cad failed to prompt the loss of ac1st16.dll solution, you only need to add Autocad system variables in the specified file on the C drive to solve the problem.