|Might be better to setup a linux/bsd/solaris based server and client. |
The whole thing might be legal as it is but generally common big name linux distro's are offered as free to use. Smaller one's might contain still legal to use but not so called free or any of the bsd or gpl terms.
"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10