Why do you have so many repeat processes, like “Dark Knight” and “svchost”??? To me, that doesn’t look right… I would also highly recommend that you run CCleaner, both the registry cleaner (SAVE THE BACKUP FILE TO “DOCUMENTS” WHEN IT PROMPTS YOU TOO!!!) and the useless unused bits of information cleaner as well (don’t worry, it’s free and never screws anything up provided you save the backup files for the registry). That’s in addition to a few virus scans. Try MBam first (also free, just the basic scanner and removal, without real-time protection), that usually detects and gets rid of most of the nasty things mainstream antivirus programs often miss (especially true of McAfee and Norton).
However, aside from that, 1GB of RAM in Windows 7 is truly not that high. A forum full of actual W7 users would not lie to you, and if it WERE truly an issue, there would be rantings and ravings all over the place that would make headline news - trust me on that. Since neither is the case, there isn't a problem here.
But yeah, you know my RAM usage is chronically at or over 1GB too, and that’s with touch-screen and multi-touch packs + OEM Acer utilities running in addition to all of 7’s native “extras”, like "superfetch" among many others.
But, you do have a few limited options here...
1. Deal with it, and be happy that $50+ of RAM is actually going to use (for stability and quicker access via preloading, giving YOU a smoother ride) where it otherwise would be completely untouched.
2. Disable most if not all of those “extras” in 7 (i.e. Superfetch and/or Aero), lose a lot of what you paid for/upgraded to 7 for in the first place.
3. Upgrade to x64 bit to unlock 4GB of RAM so that the 1GB used doesn’t matter.
4. Ditch 7 altogether for something else if it bothers you so terribly much.
Your call…
Here's the links to those programs (yes, they are safe - I wouldn't use them or recommend them to you or everybody else if they weren't).
CCleaner:
CCleaner - Optimization and Cleaning - Free Download
MBam:
Malwarebytes' Anti-Malware: Malwarebytes