Good job on the system specs and the screenshots!
The good news is I believe your RAM and CPU usage are in the normal range. Windows 7 has a totally different philosophy when it comes to RAM. Win 7 believes that unused RAM is wasted RAM. So the more RAM a computer has, the more RAM will be allocated to "something". It could be cached for future use, it could be applied towards the GPU, but it's gonna get used.
Figuring out CPU usage involves fortune tellers, Tarot cards, crystal balls, and the Psychic Hotline. Most of the processes have cryptic names like Apvfb.exe, VesMgrSub.exe, etc. Just looking at the name usually doesn't tell you a lot, particularly if the process can be killed until such time you actually need it. A lot of programs want to start up as soon as you start your computer. That usually means a process (or several) will also show up in Task Manager. Let's say you have a video editing program on your computer that starts up as soon as you boot the machine. And it has about 6 different processes. If you're not editing any videos right at startup, no need for that program to fire up until you actually need it.
So how do you know which processes you can kill? Google the process name, see what program it's associated with, and then decide if you really need to have it running. End result: fewer programs load when you start your computer, computer should start faster, and fewer processes in Task Manager. You can also use a utility called MSCONFIG to disable/enable things to see what effect they might have. Some folks disable everything except their antivirus and touchpad controls. Here are a couple of guides to give you an idea of what can be done: Using msconfig Troubleshoot Application Conflicts by Performing a Clean Startup http://www.sevenforums.com/crashes-d...-msconfig.html
I do not know why Nvidia is telling you to install Java. Perhaps it needs Java for its own GPU control panel to work and you'll need the control panel to adjust various settings for your computer. I'm not knowledgeable enough on that. If you decide to install Java, it's pretty straight forward and this is the Java website
Holding the power button to shut down a computer can lead to damaged or corrupt system files or worse. Here's a previous Forum thread of what a hard shut down can do. Windows 7 unbareably slow after hard shutdown
I would strongly suggest you run a system file checker scan to see if you have any damaged or corrupt files. Run it from an elevated command prompt (option two.) If any problems are found, run the scan 3 times and reboot your computer in between each scan. I think you need to know if any system files need fixing before trying to work on the 97 running processes. SFC /SCANNOW Command - System File Checker
Sorry for the info overload. Hope it gives you some food for thought. Post back with any other questions or concerns. Lots of tame Forum members to call upon as well as a few wild ones.