user account: how did this account get created?

I did a complete install on desktop using the recovery disks supplied with my sony. this morning I went to user accounts in the control panel to change account info and along with my account and my wife's account (both administrative) and the guest account (turned off) there is another account labeled ASP.NET.....Machine A..... limited account password protected
How did this get on? what did I do? if I can, is it safe to delete this account? I did a google search but I couldn't figure out what the heck it all means. any advice is welcome

 

thank you HALO
I did more googling with different phrasing and actually found an explanation that I could understand. Since I do very little ASP.NET developement projects (hell, I'm lucky to get the latest garage project done) I think it'll go.