MysticalGnome

Please don't go saying its not piracy as it is, Microsoft also states this very clearly in their terms of usage you are only allowed to use Windows outside of the 30 day trial if you have a genuine license key.
 
https://www.microsoft.com/en-us/Useterms/Retail/Windows/10/UseTerms_Retail_Windows_10_English.htm
 
Authorized Software and Activation. You are authorized to use this software only if you are properly licensed and the software has been properly activated with a genuine product key or by other authorized method. When you connect to the Internet while using the software, the software will automatically contact Microsoft or its affiliate to conduct activation to associate it with a certain device. You can also activate the software manually by Internet or telephone. In either case, transmission of certain information will occur, and Internet, telephone and SMS service charges may apply. During activation (or reactivation that may be triggered by changes to your device’s components), the software may determine that the installed instance of the software is counterfeit, improperly licensed or includes unauthorized changes. If activation fails, the software will attempt to repair itself by replacing any tampered Microsoft software with genuine Microsoft software. You may also receive reminders to obtain a proper license for the software. Successful activation does not confirm that the software is genuine or properly licensed. You may not bypass or circumvent activation. To help determine if your software is genuine and whether you are properly licensed, see (aka.ms/genuine). Certain updates, support, and other services might only be offered to users of genuine Microsoft software.

Microsoft allows you to download it from their website because almost no manufacturer or reseller of PC hardware includes a physical copy of the OS anymore and because of the rapid update cycle of Windows 10 it would make sense that you are able to install the latest version of Windows 10 if you should have to reinstall it without having to wait for hours on Windows Updates and countless reboots. Also my last quote which is from the end user agreement states very clearly that a trial copy is not to be used in a live environment (so that means your computer which you actively use) and is for demo purposes only (try and buy) and you are not allowed to use it after the 30 day trial period. Also just because it continues to work does not mean you are legally allowed to use it, even if Microsoft takes no action to this right now, if it came to a court case you would be on the losing end of the stick but Microsoft would never bother to do that for civilian cases only for companies.

Anything that is supported by DOS 6/7 really, so a 486DX or Pentium 1 system with a sound blaster compatible sound card.
64MB of system RAM should be more than enough to run anything in DOS, a floppy drive and an IDE CD-ROM drive should also be on the list.
With that you should have everything you need.
 
You could go the easier route and get a Pentium 2/3 with Windows 98 which is essentially DOS with a GUI.

HP DL360 G8/9 would do just fine they only take up 1U in stead of 2U and perform the same, Dell PE R610 is also a good choice.
We used XenServer in the past and pooled several servers together with a SAN backend which worked great as it allowed us to live migrate VM's to another server so we could perform maintenance on the Xen host, we also use BIND and while maybe not the best DNS server perse it does perform great, the only thing I really don't like about it is that it is really easy to screw up the configuration with a typo.
 

Do note that like I stated I am in a WiFi congested area so I am giving the range that I am able to attain so pretty much worst case scenario.
My walls are made from bricks and stone floors so my AP will have a harder time going far certainly on the 5Ghz band.
So It really depends on how his house is build what the placement will be and if there are allot of concrete walls/ceilings.
If there are concrete walls and ceilings you will definitely want one downstairs and one upstairs.
The garden and maybe a shed would also need coverage so at bare minimum one in the back, and then there is no guaranty that you would have full coverage.
So while four may seem much it really depends on the placement and what speeds he is hoping to attain.
 
Alternatively he could buy one for starters and strategically place it in the house probably in the middle and do some measurements with speedtest and wifi analyzer.
Then walk around till the point that he thinks the signal is to weak/slow and place it over there and repeat this process until he has the coverage he wants.

I recommended the switch in case you should decide to connect more than just the access points, seeing as you want decent WiFi coverage 4 ap's would be recommended leaving you with no free ports for other devices. There is also a 8 port switch variant which has 4 POE ports if a 24 port is to big for your needs.
 
I have the AC Lite and it gets about 600-700 sq ft coverage (WiFi congested area), within 20 feet of the AP I get 150-280Mbits on my phone for instance, but on the edge of coverage I barely get 15-20Mbits.
I also use the AC Pro at the office (3 of them) and they will give you better speeds and a bigger coverage area about 1000 sq ft.
If you have allot of WiFi devices (more than 5 clients per access point) I would opt for the AC Pro otherwise the AC Lite will do fine.
 
I have included an image to make it more clear (hopefully :P)

I wouldn't go for those old Xeons to be honest, they consume way to much power not to mention modern features that are lacking.
A modern Core i7 (6/7/8 gen) or Ryzen 7/Threadripper (1900X) would cream an older dual cpu Xeon setup.
If you want ECC memory Ryzen and Threadripper will support that, the needed amount of memory also shouldn't be a problem for most modern platforms.
 
And this ties into you internet speed, you could rent a beefy (virtual) server somewhere, as long as it just needs to run the game server software that should be fine.
 

I agree that nobody wants to have misinformation in the thread, however since the original question was very generic and we don't actually know what he wants to use it for, maybe we should wait for his reaction first before firing of everything about what each of them can do this keeps the thread clean and readable.

This always happens with teamviewer, just run sudo apt-get install -f and it will fix the dependency issues. It worked for me on Ubuntu and Mint.

FTTH so got nothing to complain about I guess.

You don't have to use a password, you could generate a ssh key so you can mount it from /etc/fstab without needing to enter your password.
ssh-keygen -t rsa -b 2048 Now you should have a .ssh directory in your home directory with a file named id_rsa.pub, to get it on the other server execute:
ssh-copy-id -i ~/.ssh/id_rsa.pub user@IP_address Add the mount line to /etc/fstab, depending on which version of CentOS (6 and older) would be something like this
sshfs#user@IP_address:/path/to/remote/mount/directory /local/mounted/folder fuse -o _netdev,allow_other,nonempty,ServerAliveInterval=15,ServerAliveCountMax=3 0 0 Or CentOS 7
user@IP_address:/path/to/remote/mount/directory /local/mounted/folder fuse.sshfs noauto,x-systemd.automount,_netdev,users,idmap=youruser,IdentityFile=/home/youruser/.ssh/id_rsa,allow_other,reconnect 0 0 Hope this helps a bit.

You don't have to use a password, you could generate a ssh key so you can mount it from /etc/fstab without needing to enter your password.
ssh-keygen -t rsa -b 2048 Now you should have a .ssh directory in your home directory with a file named id_rsa.pub, to get it on the other server execute:
ssh-copy-id -i ~/.ssh/id_rsa.pub user@IP_address Add the mount line to /etc/fstab, depending on which version of CentOS (6 and older) would be something like this
sshfs#user@IP_address:/path/to/remote/mount/directory /local/mounted/folder fuse -o _netdev,allow_other,nonempty,ServerAliveInterval=15,ServerAliveCountMax=3 0 0 Or CentOS 7
user@IP_address:/path/to/remote/mount/directory /local/mounted/folder fuse.sshfs noauto,x-systemd.automount,_netdev,users,idmap=youruser,IdentityFile=/home/youruser/.ssh/id_rsa,allow_other,reconnect 0 0 Hope this helps a bit.