Welcome to Seven Forums kimmern. This may accomplish what you need. I'm not sure what you'd like to adjust the acceleration for?
If you just want to change it, try this:
Start> In search box type Ease of access center> Enter> Make the mouse easier to use> Control the mouse with the keyboard section, click Set up mouse keys
There is a pointer speed, and an acceleration slider. You can experiment with both, then apply. You may have to log off then back on to see effect.
If you are trying to disable mouse acceleration for gaming, have a look HERE.
A Guy
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