First, verify that your wifi is turned off before connecting the ethernet cable, or at the very least, that you have manually disconnected from your wifi router via the laptops wifi settings. Secondly, if this problem is occurring when you're on battery power, check to make sure that the ethernet adapter isn't set to "allow this computer to turn off this device to save power". This setting can be found in the ethernet adapter properties under the power management tab. If the problem still exists, check to make sure you have the latest drivers for your ethernet adapter, you may also want to check to see if there is an updated BIOS for your laptop. Lastly, can you verify if the adapter ever worked? Hope this helps.
Can you clarify the problem? When you say Windows Upgrade, are you referring to upgrading the whole operating system? As in going from Windows 7 to Windows 10? Or do you mean that you can't install the latest Windows Update? If it's the Windows Update, the latest update for Windows 10, labeled "Fall Creators Update" has had some problems with some PCs, for most the problem sorts itself out within a few days, usually after a clean restart. You mentioned that you can't game without the upgrade, so I'm leaning more towards you are trying to upgrade from one version of Windows to another, i.e. 7 to 10, etc. If this is the case, you might want to try a clean reinstall of the upgraded versions of Windows you're trying to utilize. For example, if you're still running on 7 and you want to upgrade to 10, then download the latest version of Windows 10 using Microsoft's Installation Media Creator, found here: https://www.microsoft.com/en-us/software-download/windows10 If you have a valid Windows 7 key, then just...
It sounds like you have a defective battery. Or at the very least, a used battery that has damaged cells. Take it back to the service and report the problem, they should replace it at no charge. Defects happen, so unless this is a common occurrence with the service you used, it may be totally random that this happened.
Permission requests are very common and you'll see them a lot for first time use/changes. Remember that you Samsung runs it's own "skin" for Android (named TouchWiz). Because it's not vanilla (or factory) Android, you will need to provide it with permission to perform actions (usually just once).
Sounds like it could be a few different things: 1. There is some shred of paper somewhere that is jamming your paper feed just enough to be a problem. (not likely) 2. Are you pulling on the paper by hand or hitting the "feed" key? Manually pulling on the paper is not recommended and can cause issues. 3. Check the bottom of the paper well (the cavity the paper sits in) and ensure nothing is laying in the bottom of the well. I've seen where the plastic spindle has remained in the well when inserting a new roll and has caused issues. If you have tried and/or observed that none of the above is the culprit, please describe what steps you have to take to make it start printing again? I'm also assuming you tried just hitting the EC key when the error appears?