1) Might also use the Microsoft EMET set "paranoid" (everything always). Think 5.5 is current. It plus Defender is good.
2) CrystalDiskMark is pretty much a standard for measuring disk speed.
- slow rotating disks & USB 2.0 flash drives usually run in the 30-40 MB/s range
- fast rotating drives and USB 3.0 around 100 MB/s
- SSDs can run 400-500 MB/s
3) My Win10-32 devices usually run at about a gig, -64 2GB, 4GB should be pleanty for either. I only run 8GB because it is cheap and I can turn off the pagefile.
4) That .12GB missing from the TOM is for the video buffer. No Big.
5) My R11 (R3-131T-P344) has been hotrodded to 8GB memory and a Samsung Evo SSD. It can run with an i7 device.
ps things that have been known to take a lot of resources if misconfigured are Bitlocker, compression, McAfee, and Skype