What I see this message with
It happens every time I reach 6-5 GB left, and pretty much 80% of my applications (including svchost) drop dead once I reach the 4 GB mark. Whenever I get low memory warnings, Windows suggests me to close the one software with the highest memory consumption, and that program could be anything, typically games, GIMP, Blender, Sketchup, video editing software, every other process uses up to 250 MB only. The more RAM consuming activities I do are 3D modeling, graphic design, video tutorials, remote computer assistance, and "gaming". Quite honestly I could get by using only 12 GB of RAM most of the time, but this issue needs to be dealt with nonetheless, because actually having 16, while only being able to use 12 GB of RAM is a compromise I won't accept.
Free space, Swap
The free space on C: never went so far below 27 gigabytes, and I really hate the idea of having a page file with 16 GB of RAM. My system drive is a Samsung 840 Pro, and I can get as high as 1 TB written a month, where Google Chrome is doing 80-90% of those writes.
Here's a screenshot to attest to this, though right now I'm only using 4-5 GB of memory:
I could easily install it elsewhere, but I won't, because with my browsing habits, it usually took me 10-20 seconds with Chrome on an HDD to get the save dialogue to pop up, it was so much disk intensive (I know for a fact that disk I/O activities were the cause, because I have a sysinfo bar always visible on the top of my screen, that I coded myself in rainmeter, where I - amongst other things - query perfmon once every 100 milliseconds to give a visual cue about I/O activities on each drive). We're speaking 250+ opened tabs and 6+ GB of memory consumption on a regular basis, and that is fairly easily reached, all I have to do for example is visit an image board like wallhaven.cc, and open a couple of hundred pictures in background tabs to save (but that's beside the point, I get a lot of disk writes, it's mostly Chrome, can't move it off the SSD, all the more important that I don't have anything else on the SSD degrading its life cycle.) I'm also having concerns that having a page file of "sufficient" size on an HDD would hog my overall system performance.
Performance, Other
I have used RAMmap and several other utilities in the past to diagnose any possible memory leaks, but I have none. I have no performance problems per se, it's only what you can expect from trying to utilize 16GB of RAM with an old Phenom II 955BE clocked to 3.8 GHz (in some applications I use day to day it performs on par with an FX8350 at base clock speeds, I tried that myself with a CPU I "borrowed" quickly for a couple of tests from a client build I did a year ago, so I elected not to waste money on an upgrade). I don't ever get so much as an unexpected crash or programs not responding for a couple of seconds, my system is completely stable ever since I reinstalled it two months ago, I wouldn't even need to restart my computer if things like Windows Update wouldn't prompt me to do so. This memory issue is literally the only persistent issue I have left to sort out that carried over to my new Windows install, that's why I'm asking for help only now.
Sorry if I got off topic here and there, I just wanted you to get the whole picture of how I use my computer, that might give you an idea why it has this memory management issue.