So far as I can see you have only posted about this issue yesterday for the first time, so you’ve not let us know about this problem before now. (I’ve moved the post you added yesterday to a four year old thread to this thread to keep your problem together.)
Can you do Help > Create Diagnostic Report and attach the resulting zip file to a reply so we can see some information about what’s going on?
One thought: one Windows user experienced very slow performance due to some kind of unhelpful interaction with the Google Drive app:
If you have Google Drive installed on your computer, perhaps try disabling that to see if it helps?