You may have a Linux operating system and need to get your patches from Redhat or other Linux supporter. Other types of microprocessors exist as well. Check your purchase data to learn about them. When you find the correct one, contact them and find out when they push the patches electronically to their product users. Probably your operating system support company sends a massive electronic push once per month, a smaller weekly push, and (in an emergency to correct a serious IC chip flaw), as soon as the patch exists.
You may leave your computer on all of the time. If you do, your operating system support company regularly sends the patches to your computer. Check your security history file to see which ones you have (you want to see current dates). Contact the sender if you want to know more about the patch. If you turn your computer off at the end of your day, pick one day each week in which you will leave it on to get the patches. Also, say a prayer for your CPU.