Question: stop calculating

hi!

Hi I have a 8x8  matrix and I was attempting to get maple to find the eigenvalues. but after a while I thought it is caught in an infinite loop!  anyway I manually kill the mserver processing and saved the maple worksheet and restarted the laptop. but after all these it seems its still working.CPU usage and memory (in task maneger) are still high! 

how can I get rid of this condition?

 

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