Event - Source Userenv, Event ID: 1511

Event ID: 1511

Windows cannot find the local profile and is logging you on with a temporary profile. Changes you make to this profile will be lost when you log off.

Event ID: 1502

Windows cannot load the locally stored profile. Possible causes of this error include insufficient security rights or a corrupt local profile. If this problem persists, contact your network administrator.

DETAIL - The process cannot access the file because it is being used by another process.

2 FIXES - Boot into Safe mode and move the profile out of the way:

(Microsoft's way)

Create a New User Account

To create a new user account, follow these steps:

1. Start the computer in Safe Mode, and then restart the computer.
   1. After the Power On Self Test (POST), press the F8 key.
   2. On the Windows Advanced Options menu, use the ARROW keys to select Safe Mode, and then press ENTER.
   3. When you are prompted to select the operating system to start, select Windows XP <edition>, where <edition> is the edition of Windows XP that you have installed, and then press ENTER.
2. Log on as Administrator.
   1. On the "To begin, click your user name" screen, click Administrator.
   2. Type the administrator password, and then press ENTER.
      
      Note In some cases, the Administrator password may be set to a blank password. In this case, do not type a password before you press ENTER.
3. In Control Panel, click User Accounts.
4. Create a new user account. Windows makes a new directory for the account in the Documents and Settings folder.
5. Quit the User Accounts tool, and then restart the computer.

2nd Method

Backup files and wipe & reinstall XP