on Windows 10 my drawings from Windows 7 display poorly

Question

I switched to a PC running Windows 10 with Illustrator 24.1.1. When I open a file created on my Windows 7 PC using Illustrator 24, the lines are invisible or look extremely faint, and rounded corners show artifacts that look like added vector points that weren't in the original file.I set all stroke sizes to zero, because these are designs for CNC machining. When I open the file on my Win 10 PC, the strokes are .0001 mm in Properties.

On my Windows 7 PC, I could see the strokes, even though the were zero stroke size. If I draw a new object with a stroke size of 0, I cannot see the lines at all when I deselect the Object.

Any ideas?

Image attached of the artifacts on rounded corner.

Jacob Bugge · Answer

Ctrl/Cmd+E.

This toggles between GPU and CPU, you can untoggle if the issue remains.

This is what GPU is about:

https://helpx.adobe.com/illustrator/kb/gpu-performance-preview-improvements.html

Or, with this exquisite wording by Monika:
https://community.adobe.com/t5/illustrator/cpu-gpu-preview-modes-in-illustrator/m-p/10847674#M161071

Graphics cards are included in the system requirements:
https://helpx.adobe.com/illustrator/system-requirements.html

Apart from an inadequate card, the issue can be caused by lack of driver updating, lack of proper recognition of the card by the computer, and whatnot (including rifts in the space time, moon, weather, and the fact that Illy sometimes moves in mysterious ways).

Here are a few more pages about GPU troubleshooting:
https://helpx.adobe.com/illustrator/kb/gpu-performance-errors-troubleshooting-workarounds.html
https://helpx.adobe.com/illustrator/kb/illustrator-gpu-performance-driver-update.html

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