Our team of 15 is also experiencing this issue. Just as AAmmar1 stated, it can be exactly traced to this extention. As soon as a user disables or deletes the Hubspot extention thier computer returns to normal.
While the extention is enabled Chrome begin to take up more and more CPU until chrome or the computer begins to crash.
Has Hubspot acknowledged this issue or are they planning a fix? At this time, for most of our users, we have had to disable the extension so they may continue to work as normal.