intel proset, cannot login to xp pro sp2

Hi,

I need a bit of help. I was having a few problems with my wireless
card, intel pro 2200bg, with it dropping connections and it was
suggested that I install the proset software.

After installing the software and rebooting I arrived at a login
screen, instead of it going straight to my desktop, the problem is that
it will not accept either my username and password or the administrator
username and password.

When I click OK after entering the details the hard drive light stays
solid for a few minutes before stopping and locking the screen leaving
me with no other option other than to restart using the power button.

forgot to mention that safe mode still brings up the login screen and
won't work either.

I know I can recover the data using a live cd but I really can't afford
the time it would take to do this and was hoping someone might have an
idea to solve this problem.

Many thanks

stephen