I've done a bit of research. Looks like it can handle 1x VGA and 2xDVI-I/D correct?
1 x D-Sub - 1 x DVI-DHDMI - 1 x HDMI Display Port - 1 x Display Port
The suggested CPU is more than enough for the intended use but please do not expect to play any demanding games in high settings on multiple screens, for this you would require an add on video card, you will not get a decent add on card capable of such performance for less than $199.99+.
HyperThreading Technology is primarily used by professionals for their work in CAD, 3D modelling, rendering video and games programming etc, the average user will not reap the benefits of a CPU that has HTT such as the Intel i7 or Xeon processors, you most certainly do not need HTT capability to run third party AV and Firewall protection, also keep in mind that the intended use of the computer will not even utilize all four cores of a quad processor and so an 8 core AMD CPU (the AMD equivalant to HTT so to speak) would be a waste of resources, both performance and financial outlay wise, a random topic that I found via Google covering HTT etc
I a very sensitive about computer security and I have demanded that she be using programs other then Windows Defender/MSE.
The former is a very sensible approach but the latter is rather unfair as Windows Defender in Windows 8/8.1 is basically MSE which is regarded as one of the best AV programs that you can get, see article provided courtesy of admin here
, if you opt for installing Windows 7 but not MSE I suggest Avast
both tried and trusted protection.
Get well soon BTW