Features of ScanDisk [Windows 9x].

[defuser]

As you know, the speed of ScanDisk under Windows 9x depends on the intensity of mouse movement. I made a short recording demonstrating this effect:

As you can see in the recording, the speed of the scan increases significantly when you move the mouse. The question is, is it possible to fix this behavior so that the scan always runs at maximum speed and is not affected by mouse movement? Thank you.

Edited December 24, 2025 by defuser

[pangoomis]

Is this fixed in Windows ME's Scandskw.exe?

[defuser]

On 1/4/2026 at 9:06 PM, pangoomis said:

Is this fixed in Windows ME's Scandskw.exe?

I don't have Windows ME on bare metal right now to test this. However, on Windows ME running in Virtual PC, the behavior of "SCANDSKW" is similar, and the effect is quite good:

This provides a clear demonstration of the change in write speed during disk surface scanning, where:

"1" - when the SCANDSKW window is in the background;
"2" - when the SCANDSKW window is active;
"3" - when intensive mouse movements occur above the active SCANDSKW window.

Edited January 7 by defuser

[MERCURY127]

i think, it is just stupid typo in code: they want "eat less cpu time if user is active", but get reversed.

Edited January 8 by MERCURY127

[Dušan Vićić]

On 12/24/2025 at 5:36 PM, defuser said:

As you know, the speed of ScanDisk under Windows 9x depends on the intensity of mouse movement. I made a short recording demonstrating this effect:

As you can see in the recording, the speed of the scan increases significantly when you move the mouse. The question is, is it possible to fix this behavior so that the scan always runs at maximum speed and is not affected by mouse movement? Thank you.

it would be great to have a software that mimics mouse movement by just a keyboard shortcut, and that is compatible for 98/ME... With that, it can complete faster...