Windows cannot load your profile because it may be corrupted.

The Problem:-When you try to log on to , you receive the following error message:
Windows cannot load your profile because it may be corrupted. You may be logged in using a temporary User Profile.

Why does it happen?
It happens if the user profile is corrupted.

Resolution:-
1.Log on as Administrator.
2.Open Control Panel,click User Accounts and Create a new Account.
3.Restart the machine.
4.Now log on with another User Account (other than what you have just created).
5.Open Windows Explorer, click Tools>Folder Options>View tab>Show hidden files and folders>click to clear the Hide protected operating system files check box, and then click OK.
6.Locate the C:\Documents and Settings\Old_Username folder.
7.Copy all the files except:-Ntuser.dat;Ntuser.dat.log;Ntuser.ini
8.Now locate the newly created user account,which is located at C:\Documents and Settings\New_Username folder.
9.Paste the files here which you have copied earlier from the Old User Account.
10.You must import your e-mail messages and addresses to the new user profile before you delete the old profile.

References:-
'"Windows cannot load your profile because it may be corrupted" error message when you try to log on to Windows XP'
http://support.microsoft.com/default.aspx?scid=kb;en-us;Q318011

'How to copy data from a corrupted user profile to a new profile' http://support.microsoft.com/default.aspx?kbid=811151

OLEXP: How to back up the Outlook Express address book and mail folders
http://support.microsoft.com/kb/188854/