If you haven't heard about these vulnerabilities in the Intel chips that have been manufactured in the past 10 years, then you need to read up.
Following article will update you on how far reaching these recent vulnerabilities are and how to go about patching it. This affects your Operating Systems (Windows, including servers, Linux and Mac OS), your browser (Microsoft Edge, Chrome, Firefox, Safari) your anti-virus (list too long to name, but all major AV's) and your devices (PC's, Mac's, cell phone, tablets).
Read following article for more details:

Security researchers revealed disastrous flaws in processors manufactured by Intel and other companies this week. The vulnerabilities, which were discovered by Google’s Project Zero and nicknamed Meltdown and Spectre, can cause data to leak from kernel memory—which is really not ideal since the kernel is central to operating systems and handles a bunch of sensitive processes.

Read more: https://gizmodo.com/check-this-list-to-see-if-you-re-still-vulnerable-to-me-1821780843

You beat me to it Davio, was going to post about this myself
Microsoft have now released a patch for windows 10, however you need to be careful before installing it as some Antivirus products are not compatible with the fix

Originally posted by HuwR
You beat me to it Davio, was going to post about this myself
Microsoft have now released a patch for windows 10, however you need to be careful before installing it as some Antivirus products are not compatible with the fix

Users don't even have to worry about being careful installing the Windows 10 patch, because Microsoft won't offer it to you if it detects you're running an incompatible AV.
See here: https://support.microsoft.com/en-us/help/4072699/important-information-regarding-the-windows-security-updates-released

A list of compatible AV's can be found in this spreadsheet: https://docs.google.com/spreadsheets/u/1/d/184wcDt9I9TUNFFbsAVLpzAtckQxYiuirADzf3cL42FQ/htmlview?usp=sharing&sle=true

My webroot made the ok list...
I think all this could be a bit hyped but we shall see...

My server had been rebooted this morning when I logged on, I'm guessing this patch is why.

Yes, my PC rebooted yesterday - I think is was related to this issue.

By the way, did anyone notice your computer running slower after this whole fiasco?

not especially no.