Troubleshooting Sunday Keys for Ableton - Windows

There are some good best practices here for running Ableton on windows:

https://help.ableton.com/hc/en-us/articles/209071469-Optimizing-Windows-for-Audio

https://help.ableton.com/hc/en-us/articles/209071269-Reducing-the-CPU-load

https://help.ableton.com/hc/en-us/articles/115001041970-Avoiding-Disk-Overload

If you have a dual core processor check out the link for CPU optimization. Also many security/antivirus apps like Norton and McAfee are known to slow down your computer, usually if the auto scan setting is enabled, so you might do some research into that to see if you can optimize that software or temporarily disable it when using Ableton Live. (Do this at your own risk and always follow best safety practices for downloading files on the internet or opening emails etc.)