To solve the problem you encounter, you can try the following steps to open the DWG file: 1. First, double-click the "This Computer" icon on the desktop to open it. 2. In the pop-up window, click "Tools" on the menu bar, and then select "Folder Options". 3. In the pop-up dialog box, find and click the "File Type" tab. 4. Find the type associated with the DWG file in the list and double-click it. 5. Next, in the newly popped up dialog box, find and click the "Advanced" button. 6. Then, in the newly popped up dialog box, make sure the "Always open with this application" option is selected, and select AUTOCAD software from the drop-down menu. 7. Finally, click "OK" in the confirmation dialog box, and then try to open the DWG file. If the above methods still cannot solve the problem, please consider the following points: 1. Confirm that you have correctly installed AUTOCAD software and that it is compatible with the operating system. 2. Check whether the latest AUTOCAD version is available and ensure that you have updated to the latest version. 3. If possible, try using another computer or device to open the same type of DWG file to determine whether the problem is related to a specific computer. I hope the above methods can solve your problems.If you need any further help, please feel free to contact me.