Thanks for posting your configuration. I would highly recommend that you implement a data backup and a system image backup. I would highly recommend Macrium Reflect and AOMEI Backupper Standard. Both of these pieces of software are free.
I would also highly recommend that you add uBlock Origin as it is free and it will stop a lot of tracking cookies, ads etc. This is a great add on that I recommend to everyone to block ads.
In addition to this, you can up your security even more by adding on HTTPS everywhere to your configuration. This will help make sure your web browsing is more secure.
On demand scanning with Bitdefender is good. However, I'd like to recommend that you add more on demand scanners. I'd recommend EEK, Norton Power Eraser, and ZAM. You could even add ZAM as a primary anti-malware (AM) to your security configuration. Look around MT and you may be able to score a full license of it for free.
I would change UAC to MAX as well - this will ensure your configuration is locked down a bit more too.
Sincerely,
Brian