Help! Deleted logonui.exe! Windows Welcome Screen Gone!

Hi.
I switched on my PC...Widowns Welcom sscreen comes up I log in, windows boots up blahblahblah.

Then, a Spyware Doctor balloon thingy pops up saying something along the lines of "Detected undrlying process lsass.exe Do you want to delete after next reeboot"

Naturally, I click yes (not know exactly what lsass.exe is) and reebot. But this time round. Instead of the welcome screen I get a black background and the classic logon screen thing...which i don't want.

I checked Control Panel, registry keys, everything was set to Welcom Screen style login, but whenever I reboot. It doesnt come up.

Has this got anything to do with the fact that lsass.exe was deleted? If so....Anyone have a copy out there I can restore?

When you deleted it, did it go in the recycle bin?

Nope.

I searched in Windows32 folder or something along those lines, and it's infact, still there. So Spyware Doctor must have deleted an actual virus :O
Anyway, I stil have this welcome screen problem!

HELP!

To tell you the truth, you're better off using the login. I never liked those welcome screens.

Haha, Well it's for other poeple who use this computer (who aren't so computer literate) so it's easier for those people.

Any ideas anyone? Please help! haha.

Do you have the install CD or can you use a restore point?

Enable or Disable Fast User Switching
Note: To enable Fast User Switching, you must also enable the Use the Welcome screen option. This feature cannot be used if your computer is a member of a domain. To enable Fast User Switching:

1. Log on to the computer as an administrator.
2. Click Start, click Control Panel, and then click User Accounts.
3. Click Change the way users log on or off.
4. If it is not already selected, click to select the Use the Welcome screen check box.

NOTE: The Use Fast User Switching check box is unavailable until you click to select the Use the Welcome screen check box.
5. Click to select the Use Fast User Switching check box, and then click Apply Options. Quit the User Accounts tool.

Try to grab file from another pc, also can find file online,,

gl,

Restore point .... No luck.
The options in the control panel change absolutley nothing .

I tried the XP CD that came with the PC but it didnt have anything on that could help. AAAHHHH. When computers don't work >_< Hahahahahaha.

There should be a copy of that file on the CD. Try to copy it to wherever it's supposed to go.

I already found the lsaass whatever file is actually still on the system. So it msut be something else that is messing my Welcome screen thingy.

Try F8 and boot to last known good configuration.

Last known good won't work since he has successfully logged in already.

Is that all the determines a last known good config, a successful login?

Yep