The same errors are happening on two different laptops. What's going on?

Hey guys. Three years ago, I bought a new laptop because my old one started having a lot of problems (I had it for 10 years). The strange thing is that for the past year, my new laptop has started having the exact same problems, and I don't know if it's just a coincidence, a virus, or something else.

Here are the problems my laptops have been having:

\- They start working fine for a while (a year or a little more).

\- The battery starts connecting and disconnecting, probably due to a loose connector.

\- The battery starts working fine again if I put the laptop's connector in different positions.

\- The laptop's touchpad starts malfunctioning (it doesn't recognize movements properly or it freezes constantly).

\- Some keys on the keyboard start to malfunction.

Blue screen errors begin to appear, which can initially be fixed simply by just restarting the laptop.

\- The battery connector stops working no matter what position it's in.

\- After a while, a blue screen error occurs that cannot be fixed (this is what killed my previous laptop; the new one I have now still works).

I searched online and it says that blue screen errors can occur because a USB drive or the laptop's connector itself is constantly being plugged and unplugged, causing a bug in the laptop. With my first laptop, this seemed logical, because my previous laptop died when I was using a USB drive that I kept plugging and unplugging carelessly, and I was also constantly disconnecting and reconnecting the battery, which loosened the laptop's connector.

But with my new laptop, I don't understand what's happening because I'm now careful with the USB ports (I've never used the same USB I used on my old laptop; I bought a new one) and I almost never disconnect the laptop's battery precisely to prevent the connector from loosening, but it still happens.

Finally, I should mention that I use my laptop every day, all day long. I almost never turn it off; at most, I put it in sleep mode like I did with my previous laptop, so I don't know if this constant use could have caused these problem.

What do you think is happening to my laptops? How to prevente these same errors happens on a new laptop?