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DiapDealer · 11-20-2022, 08:30 AM

If Sigil 1.8.0 is running slower on Windows 10 than it did on Windows 7 (on the exact same hardware), it's not likely to be the hardware (although 4Gb of ram sounds a tad low for any application that uses QtWebEngine if I'm honest).

I seem to recall having my own issues with extreme Sigil sluggishness on Windows 10 a long time ago. If I recall correctly, Sigil had run afoul of some built-in compatibility mode (based on the Sigil.exe executable name). Right-click on sigil.exe and open the Properties dialog and go to the Compatibility tab. See if there's anything obvious there.

You can also try excluding Sigil's program folder from Defender. Excluding Sigil.exe alone might not be enough since Sigil also uses qtwebengineprocess.exe and python.exe.

Are all of the Windows 10 updates applied? I also seem to remember some serious app slowdowns all along the Windows 10 update road.

11-20-2022, 08:30 AM	#2
DiapDealer Grand Sorcerer Posts: 28,643 Karma: 204624552 Join Date: Jan 2010 Device: Nexus 7, Kindle Fire HD	If Sigil 1.8.0 is running slower on Windows 10 than it did on Windows 7 (on the exact same hardware), it's not likely to be the hardware (although 4Gb of ram sounds a tad low for any application that uses QtWebEngine if I'm honest). I seem to recall having my own issues with extreme Sigil sluggishness on Windows 10 a long time ago. If I recall correctly, Sigil had run afoul of some built-in compatibility mode (based on the Sigil.exe executable name). Right-click on sigil.exe and open the Properties dialog and go to the Compatibility tab. See if there's anything obvious there. You can also try excluding Sigil's program folder from Defender. Excluding Sigil.exe alone might not be enough since Sigil also uses qtwebengineprocess.exe and python.exe. Are all of the Windows 10 updates applied? I also seem to remember some serious app slowdowns all along the Windows 10 update road. Last edited by DiapDealer; 11-20-2022 at 08:33 AM.