SystemEnvironment and SystemTime privileges. What are they?

I already asked the same question here;msg212887#msg212887

Since after a "standard" installation of the latest CIS 3.5.54375.427 (only Firewall and Defense+ choosing Optimum Proactive Defense+ during installation) those two items don't appear in my list

I am wondering if it is something related to my PC hardware/software configuration.
I have Windows XP Home SP3

Where can I check (e.g. Windows registry or somewhere else) if those items apply and I only have to add them “by hand”? ???

I am a noob so I’d like to know if and where I can check if those “features” apply also to my PC or if they depend on some hardware/software configuration