I guess I wasn't clear, sorry, I meant to emphasize the "how it operates" part of that sentence
Hi Faith,
Somebody will probably correct me, but my understanding is it doesn't
do anything.
If if helps, think of having a file on you computer called sdfj.pxe, which contains the text "dsf8aifji". It doesn't do anything useful, or dangerous, but if you copy the contents of you disk drive, you'll find the copy also has a file called sdfj.pxe that doesn't do anything.
If it's there or not doesn't make any difference to the rest of your computer (apart from taking a few extra milliseconds to do a copy) it's just along for the ride.
If it doesn't help, of course, ignore it.