Raghav Arya

Yes, as long as your motherboard has a compatible m.2 slot for the m.2 drive you are wanting to use.

YES, so long as the board supports NVMe.

Yes, it's what I use on my personal computer. Side note it won't remove old programs. you need to manually delete those through "programs and features" which you should be doing anyways about once a month.

yes

Nope. It cannot physically damage the hard drive while scanning.

no

possible imcompability or defect ram stick. 
 
Try putting only that 4GB stick and boot again. 
 
If issue still persist, try running Memtest for a while to see if any errors shows up

Make sure the sticks are in tight. It will do that if its not

The motherboard needs to support DDR3. Does it?

I would say the 6D over something like a D610 or D750

Definitely not a simple answer to give.  Are you planning to use long exposure photography technique, artificial lighting technique or boosting the ISO to capture photos at night or in low light?
 
If you are thinking about boosting the ISO, currently the Sony A7s II is the High ISO King.  But as I do not have experience with this camera myself, I am not able to give you a comparison of the High ISO noise pattern the camera might produce compared to other cameras.
 
Between Nikon and Canon, at High ISOs I prefer the noise pattern of the Nikon.  The Canon cameras I've used so far produces fixed pattern noise at High ISO that I do not like.  This is of course a personal preference and with some clever editing it can be taken care of in any camera system.
 
But for long exposure and artificial lighting technique, Canon, Sony and Nikon produces good cameras.  But I am biased towards Nikon because the cameras I own and use are Nikons with some of their fastest lenses and lighting systems.
 

A 6D won't make you happy at night, especially not because of the high noise floor.

Well, its not really as simple as that, depends on the budget

It's probably a background task like a virus scan or something. Run Task manager and in the performance tab, click Open Resource Monitor and in there, navigate to Disk tab and in the Disk Activity view you can see the program/task that's reading or writing to the drive. You can tell by the file it's accessing. You can, but for stability's sake shouldn't, kill the task from the list above. Instead, you should let it finish, shut down and unplug after that.

If you're curious on what process is using something on that storage device, use 3rd party task managers like process hacker, process explorer, or resource monitor and look for process list that shows file usage or disk usage list.
 
If you don't care and certain no program you are running is using files on that storage device, just unplug it.

Are you currently using any programs on the drive or are any programs on your computer using the drive?

There might be an application running in the background that is accessing the drive. Check any open programs and task manager to see if there is.

set your favourite resolution, put up an fps counter, and start spinning dials until you have found a sweet spot.

start at medium default preset and go on from there, if it's all smooth maybe increase the details or lower shadows if its laggy, if you have nvidia shadowplay, just let it set the best profile and you can tinker in the game later on. 

Yes it is. McAfee was bought on February 28, 2011 by Intel.

It scans all explorable devices, I should know, I use McAfee Total Protection. Also,
 
he didn't say he is looking for a new anti-virus, he asked if McAfee scans USB Flash Drives.

Since normal consumer ssds (850 evo) reach speeds upto 6 gigabit per second.
Intel 750 SSD, that should easily exceed 10 gigabit per second

ssd's top out at around 550 MB/s for sata 3 ssd's

Yes.
If it's from Seasonic, it's good. Always look for reviews, though. Sites like JonnyGuru and HardOCP are good places to look.
The Cooler Master V650 also isn't a bad PSU.

CS is significantly better than the CX. That being said it's still outperformed by the Antec EarthWatts 30 watt in build quality