[50420]

hope someone can help with this!!
a friend of mine was given a laptop with her new job and wanted a hand to configure it to work with her home network that i setup for her.
its a dell dimension xp pro, we sorted out the internet connectivity, but had a problem finding the printer connected to another of the home pc's
i'll hold my hand up and say i did get frustrated,without engaging my brain, i changed the laptop from domain to a workgroup and was promtedto restart. as i clicked the yes option,my brain engaged...and realised there might be a problem when it came to logging back on.... and there was. it starts up as normal, gets the ctrl alt del to login option...then the uid and password.
the problem is,it wont accept the password.
i'm thinking now that pc's in a domain would athenticate to an active directory server,but we could login, from home, prior to my changing it to a workgroup, so the mistake i made should be reversible without my friend notifying the network admin at work? you guys can probably tell that i aint familiar with domains,but if there's anything i can try, without making things worse for the friend, i'd appreciate any advice