in the advanced section of performance it says
Im guessing why my computer only reads 768! so can I bump this # up?
You limited virtual memory to only 768 MB, which is way too low if you're getting an error. Your system only detects 768MB of RAM for a totally different reason. It either doesn't support 1GB modules or you bought an incompatible module, e.g., single-sided when dual-sided is required.
Set your virtual memory minimum to 512MB and the maximum to 1.5GB. You get an error whenever the peak gets close to the limit.