Bonjour is Apple’s technology for Networking and file sharing that Adobe uses in its Version Cue (it’s also used in iTunes, printer software, etc.).
Adobe’s implementation of it has it always running and searching for and trying to connect to networks and servers.
You’ll see it running (in Task Manager) under names like “Bonjour” or “mDNSResponder”.

It’s very intrusive, unwanted, and installed without your knowledge… hence my “crap” label.

 

Anyway… you said the scan you just ran showed you had 2048 MB of memory “installed”, but when you set Photoshop to 68% it’s using 700MB (?).
If I understand you correctly, that sounds like you have some more bad memory.

 

SWAMP