When I opened the file in Draftsight, there was an image-like problem.

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You must close the program. Before you close the program, you can save your changes to the following location.
All saved changes are prior to the last command used.
Do you want to save your changes?
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When I opened a new file and loaded a problematic file, the error window did not appear.
If you open the same file on another computer, there is no problem.
All computers have security programs installed, but problems occur only on certain computers.

Is this a problem with computer setting?