I tried this free Microsoft cleanup tool to see if it'd speed up my Windows PC - here's the result

To grab PC Manager, head to its dedicated product page or go directly to its Microsoft Store page. After installation, open the program. If you wish, you can set it to start up automatically each time ...

I found the best way to run an internet speed test (and use the results for better Wi-Fi)

After a decade of testing PCs, routers, and home networks, I know what causes slow speeds and how to optimize your internet.