A good place to start would be with our performance guide below. There are some Windows specific recommendations along with some others for troubleshooting a site level issue.
For starters, as a test, if you spin up a new, blank site in Local does that act slow? If it does then there may be a problem with a setting or conflict on your device. If a new site is fast but only the specific site you’re working on is slow then maybe it has a conflict within it’s configuration like with a plugin or theme.