HI, I have an iMac 27" display that is about 2 years old. The configuration is as follows: 3.4 GHz Intel Core i7, 32GB RAM, NVIDA GeForce GTX 680MX 2048MB graphics card and I'm running OS X Yosemite v10.10.2. I'm running Norton AntiVirus 360 and my virus signatures files are updated.
I've noticed a strange issue lately where my Mac will reboot overnight. It will also begin to slow down a bit and shut down Safari suddenly. - This happens mostly when I'm on eBay. I've begun to us eBay more often lately because I'm restoring an old car and I'm looking for parts, so I spend a lot of time on eBay now as apposed to before where I visited eBay maybe once in a long while. -- I have not noticed this symptom with any other application or website.
Could the reboots have anything to do with eBay? If so, what is it and how do I resolve it - (other than not using eBay).