windows wont login wierd, start up never seen before

[Kzz5]

ok first i took out ram from my other computer to put in my newer one, i kno they are compatible,moving on, when i booted windows it showed the screen that asks u to start windows normally cuz it couldnt start up, so i took out the ram, and my computer booted, but this screen came up saying wrong password, when i click ok, the screen goes away, i press alt escape and the login screen comes up, i put in my password and sn, and it goes away, to the same windows screen, doesnt go to desktop or anything, when i press alt escape again nothing happens, this keeps hapening, one time it said regedit recovered 1 file succesfully, and then that screen again that stays there, i did that thing awhile ago where it auto logins in for you, i dunno what to do

edit: im running win xp sp2

i did find a trojan a few days ago, i always keep my comp running, this was the first time since then that i restarted it

[robbro]

have you tried booting in safemode ? press f8 at start up

[Kzz5]

yeah i did that, and it still does the same thing, accept it says safe mode all around and stuff

[robbro]

okay as your user name or as admin ? try admin login if you have not.

[Kzz5]

even if even i do both, it still does the same thing, so i am just installing windows over my current partition or something, can i do that ? so my files arent erased?

[robbro]

yea you can just reinstall windows that should keep your files as long as you dnt format it . You could of tried when you saw the safe mode screen to press ctrl + alt + del and run new task either cmd.exe or explorer.exe and see if that worked..

Or you can boot up safemode with command prompt and delete all your temp files. then reboot and see if it improves.

[robbro]

also i dont really understand what part you can see on your screen or not im a bit confused. can you log in or not really ?

Because if you cant log in you can reset your password.

try checking this link

[Kzz5]

the login screen would go away
but the background for the login would stay the same, its just blue and says xp its ok though
i reformated i have the day off tomorow anyways y not install all my crap

[robbro]

[icecube]