Minecraft Wont Launch says I don't have enough RAM even though I have 3-4 GB & Possible Nativelog errors

I recently swapped my HDD out for an SSD and had to downgrade my RAM to 8Gb from 16Gb.

Yesterday I spent the entire day trying to figure out why my game kept crashing from a memory fault. I eventually found what I thought the culprit was and cleared my standby RAM and It still continued to crash.

I have checked the Nativelog.txt and found that the Jre-x64, launcher-bootstrap, and launcher-core were all out of date and that the Nativelog had tried to update them unsuccessfully, I then repaired Minecraft and re-installed it multiple times but the Nativelog still seemed out of date.

What is my issue; and how can I fix it?