Windows 10: Why did my computer suddenly become unable to connect to or even see wifi at all?

I have been connecting to the wifi of my house with this computer just fine for about two years, now. Tonight, it suddenly disconnects and it turns out it can't connect to anything related to wifi anymore. The quick tool to see which networks are available disappeared, and I can't seem to find anything in the parameters either.What gives?

:)

 

Win10 computer suddenly unable to access printer on home wifi

For some reason, the printer lasted less than 24 hours printing correctly, and now I again can't fix it, even by doing what "worked" before (Comment #6 upthread).

Regarding the static IP suggestion:

1. The printer is connected via USB to a Windows 7 computer on the home network. It's not on the network by IP address. Here is a screenshot of the printer port properties.
   
   
2. Although there ARE "headaches" as is said above, the vast majority of the other computers on the home wifi network, NEVER have had a problem printing to it. And this applies to computers that have run XP, Win7, Win10, and MacOS. For the most part until now, it's included the particular Win10 computer in question.
3. If I still might be able to give it a static IP address, will this affect the other computers that have been able to print to it fine using printer name?

 

Dell computer unable to connect to WiFi

My Dell laptop is unable to connect to the WiFi in my room while my phone and smart tv are connecting and acting normal. This issue started this morning and it is the first time I've had such an issue. Interestingly enough my computer is capable of connecting
approximately three steps outside of my room but never inside of it. I have tried uninstalling WiFi driver and trying to mess around with Network settings but nothing is helping? Is it possible the computer is damaged in such a way that it has shortened the
distance from which it can detect WiFi somehow.

 

Win10 computer suddenly unable to access printer on home wifi

I was not able to ping the Win7 machine.

However headache-ridden this setup might be, I've had it for close to a decade, and remote machines - XP and Win7 and Win10 and Mac - have all easily printed from it. As did this, until it stopped working.

Two other questions:

1. How does one this SMBv1 issue you suggest? Sorry, not familiar with that term.
2. In looking at the event viewer, I am seeing near-daily critical errors from the machine being powered off by the button, versus the normal Windows shutdown (and will address with the family member who has the machine). Could this have been the cause of it suddenly not working? And any suggestions to look at and fix whatever may be wrong, if this is a possible cause?