The planet designated here was M7G 677. According to Martin Gero, the designation was derived from Martin 7(July) Gero 6’77. Gero's day, month, and year of birth (July 6, 1977).

Plug and Play, Older Version of Windows
When trying to restart a piece of Ancient equipment McKay sarcastically refers to a Microsoft technology called "Plug and Play" and dubbed "Plug and Pray" by its detractors. The idea was that devices could be installed and Windows would become aware of them automatically, if they were implemented according to the spec. The reality is often more like McKay's attempts to restart the Ancient device although Microsoft and Windows have improved considerably in this area as time has passed.

[as they enter the ruins of an ancient city]
McKay: Didn't fly over "this" on the way down, did we?
Sheppard: I don't know. I was kind of busy with the whole trying not to get us killed thing.

McKay: Let's see how long we can be quiet. Who can be quiet the longest, huh?
Cleo: Well, I not a quiet person.
McKay: That's not quiet. That's talking.
Cleo: Well, I'm not a quiet person. I talk a lot.

Maj. Sheppard: You think it's worth checking out?
McKay: Any significant energy emission generally indicates technological civilization.
Maj. Sheppard: So you think it's worth checking out.
McKay: I'm sorry, yes - energy field good.

McKay: I don't know what I did. These things are usually plug and play. This device was using an older version of Windows.

McKay: I can't get any work done with you two buzzing around asking stupid questions, in your stupid little voices. Now sit down and shut up!
McKay: (as Cleo begins to cry) Oh don't, d...don't.
Casta: You're mean. (hits McKay)
McKay: Thank you for finally noticing.