"The User Profile Service failed the logon. User profile cannot be loaded”, when logging on to Windows 7 or Windows Vista

Note:- You must be able to log on to an administrator account to fix your user profile or copy your data to a new account. Before starting fix the issue, log on to Windows by using another account that has administrative permissions

Method 1: Fix the User Account Profile

1) Click Start

2) In Start Search (Windows Vista) or Search programs and files (Windows 7) area, type in regedit, and press Enter.

3) If prompted by UAC, click Continue (Windows Vista) or Yes (Windows 7).

4) In Registry Editor, go to: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

5) In the left pane, look for the folder name starting with S-1-5 (SID key) followed by a long number. then click each folder and locate ProfileImagePath from the right pane, double click to verify that this is the user account profile that has the error.

If you have two folders starting with S-1-5 followed by same long nubmers and one of them ended with .bak. Change the .bak folder to normal one. To do this, follow the steps below:

a) Right click the folder without .bak and choose Rename. Then add .ba at the end of the folder name.

b) Right click the folder with .bak and choose Rename. Then remove .bak at the end of the folder name.

c) Right click the folder with .ba and choose Rename. Then change the .ba to .bak at the end of the folder name.

If you have only one folder starting with S-1-5 followed by a long numbers and ended with .bak. Right click the folder and choose Rename. Then remove .bak at the end of the folder name.

6) Choose the folder without .bak, in the right pane, double click RefCount and type 0 and then click OK.

7) Choose the folder without .bak, in the right pane, double click State and type 0 and then click OK.

8) Close Registry Editor.

9) Restart the computer.

10) Log on again with your account.

Method 2: Log on to Windows and copy your data to a new account

Method 3: Delete the error SID and create a new profile

To resolve this problem yourself, follow these steps:

1) Delete the profile by using the Computer Properties dialog box. To do this, follow these steps:

a) Click Start, right-click Computer, and then click Properties.

b) Click Change settings.

c) In the System Properties dialog box, click the Advanced tab.

d) Under User Profiles, click Settings.

e) In the User Profiles dialog box, select the profile that you want to delete, click Delete, and then click OK.

2) Click Start, type regedit in the Start search box, and then press ENTER.

3) Locate and then expand the following registry subkey:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

4) Right-click the SID that you want to remove, and then click Delete.

Log on to the computer and create a new profile.

For Detailed Information Please Visit (support.micordoft.com)