It was MegaSync. On fresh installs i was installing software from new downloads. I never tested a fresh install for a long period of time but wouldnt that be the same experience as the Guest account as described previously? The Guest account never gave me any issues but then again as @casperes1996 said i probably wasnt using enough RAM to access the RAM stick in the 4th slot. Using enough RAM would be something i would be constantly doing in my primary account.
That's exactly correct. Like Fishrrman, I don't think the issue is RAM related but it could be if you have the issue even after swapping the RAM out of what you think is that bad slot.
What about using a ton of RAM with a native app before reinstalling all our your software? Something like an obscene number of Safari tabs.
I haven't seen MegaSync cause any problems to date but again I've only ever seen less than 10 people using it.