Spitbath

I was having a problem with the supplemental update last week where when I would restart after downloading the update, system prefs would still say an update was available. I restarted about 5 times before calling Apple support. I was on the phone with them for 3 hours, ran a bunch of tests, including reinstalling the OS from recovery mode which gave us the error message, "PKDownloadError error 8." He said no one has ever received that error before and he wanted me to send him a photo of my screen. We finally figured out it was third party RAM that was preventing the update from installing. We put the RAM that shipped with my machine back in and ran the update with no problems. I have to wonder if this is related to that issue?