I had this bug at one point, i never had to stop that service but i did have to make sure there were no sounds playing during the calculation. This includes the chime that plays just as the "now start to calculate" box pops up, which meant at first i thought it was just crashing in general, but in fact if i waited a second til the chime sound ended then pressed ok it worked no problems.
I'm not sure if you can mute the sound or something and that works too, if not i guess stopping the service is needed for those longer calcs.
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