I still like Win7 & I do have legacy apps that only runs in that OS.

But I do highly recommend the following :-

1) Ensure Windows Updates is up-to-date.
2) Install a reputable anti-virus program.
3) Ensure Internet browsers (eg. Chrome, Firefox) is updated.
4) Do use the "Save Password" features in any browsers.
5) Limit the internet browsing time, stay OFFLINE unless really required.
6) DO NOT use it to perform any banking transactions or access social media platform unless really necessary.

Have fun.....