That will be the general bricking your MB concern. Basically if you stop the BIOS update whilst it's underway, you can render your PC unusable, as the BIOS is the core firmware that your entire PC needs to simply "work". It's not a challenging process, you just have to run the update, and make sure that your computer doesnt switch off / lose battery (laptops) / have a power outage whilst it does it, otherwise you can brick the motherboard. Modern MB are putting features in place to help with this.
It's a simple process, just if that simple process isn't followed properly, then it can have big impacts - it's why if you have a laptop, the BIOS update utility usually won't let you update until you plug the charger in, to ensure it doesn't run out of battery. Equally some people get
impatient with a BIOS update and pull the plug -
worst thing you can do. It may sound scary, but it really is a simple process, just follow the instructions on your motherboard or manufacturers manual. Dell PCs tend to have an inbuilt update utility that will do the work for you.
Yes do what @Colif says regarding the driver updates first, he's pretty damn experienced with BSOD issues (amongst more I'm certain) - updating your BIOS is completely seperate from resetting your PC, if it's your BIOS that is the problem, then resetting your PC likely won't help if you reinstall the same programs again as the conflictions can come back. However updating your BIOS may solve your OS issues entirely if this is the cause of your problem.
The other thing you'll want to do is make sure your windows is completely up to date, the XBOX app crash is Microsoft owned, so making sure your windows is up to date will also make sure all Microsoft drivers are updated as far as possible.