strange path name for my user name

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in the command line of any of the files or folders, it says .OWNER-PF68LBC21
after my user name. like this: "C:\Documents and Settings\(my user
name).OWNER-PF68LBC21\My Documents\Games". it does this for me but not my
mom's or sister's stuff. what does it mean? it makes no sense besides the
"OWNER" part...
.