Question : Problem: Memtest86+ -- 6 error's in 593 passes -- all on test 7

So I know 6 error's in 593 passes is not much.   But I don't really know what I should make of it.  

Basically, the reason I started testing, is the PC will boot up, but whenever I try to open a browser, it wont be long before it crash's.

Based on 6 errors in 593 passes -- is it likely that the RAM could cause such a predictable problem?  If not, is it possible?

Answer : Problem: Memtest86+ -- 6 error's in 593 passes -- all on test 7

Bad power supply or bad caps on motherboard will cause memory errors by giving the RAM out of spec voltage spikes or by allowing noise and/or EMI into the power for the RAM.

Without an oscilloscope the only thing you can do to check for this is visually inspect the motherboard capacitors and [inside the power supply] check the caps and for signs of overheating parts.

NOW: In addition to memory Errors those things above WILL also cause No-BOOT, Re-BOOT, BOOT-Loops, and Crashes.

That said:
6 errors in 593 passes is like nothing. -> NOT likely to be causing your stability problems.
.