xp asks for non-existant password

My xp keeps asking for a password after resuming from hibernate or after switching user(on the 'welcome' screen.)
It asks for password even when I haven't set one for a particular user.
and for the user I do have a password, entering the password doesn't works.
After a restart everything works fine.. until I hibernate again or try to switch users.
Logging-off a users works normally as well. So basically xp asks for a password on the welcome screen 'if and only if' a user is logged on.
I did a scan, nothing found. Could this be a problem with my toshiba laptop, earlier it set up a bios password all by itself(which was solved by wiping bios).
This had happened a few months ago, reinstalling xp solved the problem(the basking for password at logon problem).
Laptop - toshiba a135-s2276


Thanks

 

Did you try to just press enter when the password prompt came up? Perhaps it's set by one of your program and is left blank by default. Check in the control panel to make sure that you don't have a password. Also, how did you get around the BIOS password by reinstalling windows? You shouldn't even be able to boot from the CD-ROM without entering the password.

 

If you hibernated under your account your password is required if you setted it up like that.

 

haha reminds me of when I had to set up my dual boot for my desktop. I had got a corrupted boot.ini file and to be able to boot into xp again I had to fix it via dos command promps and to log into the repair manager it asked for my admin password.

I was like WTF?? I dont have an admin password.... so I tried all my common passwords in all combinations of upper/lowercase... problem is after 3 guesses it says "you fail" pretty much and forces a comptuer reboot then you have to wait for the whole freakin sequence again fro boot from cd, and then windows repair manager to load from the windows cd....

I had to go thru this maybe 20+ times before finaly I just hit enter with no password and BAM! it went thru to the command prompt and let me fix my boot file...

I wanted to hit myself. Thing is I swear up and down the first 2 times I tried using blank and it didnt work.

 

nah, I had to dis-assemble the whole thing, and then twisted the CMOS battery till it broke. Now my lappy runs without a CMOS battery, the li-ion batterty does the job instead.

I tried hitting 'enter' ofcourse and once it worked, but generally it doesn't work.
As a workaround I have disabled 'ask for password after resuming from hibernate or standby' from group policy settings.