the admin account is all messed up

[Guest]

my bro made himself the admin n he made me the limited account but then the
next time he logged in, the comp just froze rite after the comp started up
(like after 30 sec) and then we tried to make all of the other accounts as
the admin(to make things rite again), n the same thing happened (it only
happens to the admin accounts)... we tried to do the system restore in the
safe mode but then it always says that the group policy disabled it n we need
the domain admin to do it... well whos the domain? we tried to do it with all
of the other accounts but it wont work n then the task manager wont open
nemore.. it says the admin disabled the task manager too! this is so
confusing.. so can nebody help me?

 

[Guest]

on the loggin screen press ctrl +alt del then hold down crtl + alt the enter
del again this will put you in the administrator account then reset your
account back the way you want it.