If you run a modern Intel CPU you have to be aware of the rather large security issue found late last year. The only way to fix it seems to be to patch the OS (Windows/Linux) but that will have the drawback that your machine will be at least 5% slower. Not patching it simply is not an option, this leak is to big to ignore.   The internet is awash with articles about it, but for a quick heads-up I advise this one: https://www.howtogeek.com/338269/a-huge-intel-security-hole-could-slow-do