cmcnaughton56 :
Thank you for your response. Please see my reply to eriess2010. The model is an X553M. Unlike older ones, the product key is not on a sticker attached to the laptop and I think I need this to do a new Windows install. I've tried a bootable USB to no avail. I'm not an IT expert and have never needed to be, so this is all very time-consuming and confusing. P.S. love the cat!
I'm afraid you're going to have to attempt another USB boot - I know you said it didn't work for you before, but it is pretty much your only option. My apologies in advance if the following sounds somewhat patronizing, or repeats something you've already done, but follow these steps:
1. Use a second computer and download the Media Creation Tool from Microsoft. This application allows you to select the Windows version that matches your license, e.g. 'Home' and '64-bit'. When prompted to choose between using a DVD or USB media, select USB. The MCT will then create an ISO file. You also need an empty 8GB USB stick
2. Go on the Internet and download a small program called Rufus. It's freeware and perfectly safe. It's not the only such program available, but it's fairly easy to remember and use. With Rufus you can now 'mount' the ISO file onto the USB stick making it a bootable drive.
3. Insert the USB drive into your 'dead' ASUS and follow the instructions. Make sure to delete and format any drive you see. If Windows Setup asks if you want to create a Windows.old partition, click No.
4. When Windows Setup has finished the initial stage, you'll see a count-down bar. Be alert and remove the USB drive the moment the count-down reaches zero and the screen goes black. This is important because if you're too late, the computer will register 2 bootable drives and go into an installation loop.
5. From this point on, Cortana will guide you through the rest of the setup process.
Modern laptops that ship with Windows will not have the traditional CoA sticker. Instead, the PK is 'encoded' into the motherboard. If you created a Microsoft Account the first time you opened your ASUS, Windows 10 will automatically activate your license during Setup.
If your ASUS is only 2 years old, it's definitely a Windows issue. The recovery features in Windows 10 are very unstable and unpredictable. Speaking from personal experience, I can say that using Reset this PC will either solve your problems or make them much worse - you just never know if this is your 'lucky day'.
You can't disable automatic updates in Windows 10 Home. You can designate specific hours when updates will install, so as not to disrupt your work schedule, but the feature is mandatory, and still quite controversial among users. If you use Windows 10 Pro or Enterprise, you get a few more options and a bit more user control.
The reason I asked if you can be without the laptop for a few weeks is that you could try and contact ASUS and see if they sell a recovery CD or USB. Some manufacturers, e.g. Lenovo, will sell you recovery media, with prices ranging from $50 to $100.
Best of luck,
GreyCatz.