Hi Grace
So MailWasher is using a lot of CPU on the Windows 10 machine ?
Try going into Help >> About >> click the link at the bottom to open the data directory >> go back and close MailWasher so it is not running >> back in the folder you just opened, go into the Training folder >> delete the file TrainingMA.dat >> restart MailWasher. Hopefully that corrects any high CPU usage.
Cheers