help please..not sure where i should have posted this ...

... ok.. i have a two part question i guess.. i have done some research (google) -on lost passwords.. and now i'm kinda confused as to what i'm looking for..
ok.. i put a new mother board into my computer.. it just goes into the safemode/normal setting/etc screen.. so.. i boot to windows XP CD.... i try to repair (because i was running this windows xp before i changed the mobo) - it only gives me the option of choosing 1:C/drive - so i choose that.. and then.. it asks for the Administrator password.. i dont know this...

question one.. is this a Bios password or windows password? -

question two.. HELP ME PLEASE!? -- i was assuming that it was bios.. and i cleared the cmos with the jumper and removing battery.. no good... it still asks me for this admin password? when i go into setup..i dont even see a spot for admin password.. and the other user password is already cleared... so.. i'm stuck... how do i clear this admin password and is it a windows thing or a bios thing? thanks for the help .. sorry for the long post...