User profile service will not load. Enter password will not let me even in desktop to do anything

SOURCE: Dell Inspiron 1420 - says user profile cannot be loaded

Try this, it should work and it really is quite easy to follow -

1. Boot up in Safe Mode. To do this, hit the F8 key while the computer is
booting, and then scroll down to the "Safe Mode" option and press enter. On
my computer the user account icon appeared, but bigger than normal, and I
clicked it and it loaded my desktop in safe mode. It came up with an error
bubble saying that my user account hadn't loaded properly, but I just ignored
this.

2. Click the Start Button and in the white "Start Search" space at the
bottom type "regedit" (without the quotation marks). This will open the
registry editor.

3. In the left-hand pane, navigate by clicking the little triangles next to
the following folders:
HKEY_LOCAL_MACHINE
SOFTWARE
Microsoft
Windows NT
CurrentVersion
ProfileList

You should now have a list of folders all starting with S-1-5- and then a
number.
(You might need to drag the divider between the 2 panes of the window across
so you can read the whole folder name)
Look at the end of each name and you should see one with .bak at the end of
it, and there will be another one above it with exactly the same name but
without .bak at the end.
The one that's got .bak at the end is your old User Profile that Vista has
now made into a backup, and the one without .bak after it is the new empty
User Profile that Vista has created.
Just to check that this is the case, have a look in the right-hand pane for
each of the 2 folders and look at what's written after "ProfileImagePath".
For the folder with .bak at the end it should say C:\Users\ and then your
usual User Account name, and for the one that doesn't have .bak at the end it
should say C:\Users\TEMP.

What you need to do now is to rename the folders in the left-hand pane so
that the one with .bak at the end changes back to being the one containing
your proper User Profile and the new one without .bak at the end becomes the
backup. Do do this follow the next step:

4. Right click on the folder with .bak at the end and then click "rename",
and just change the ".bak" part to ".bk" - i.e. just remove the "a" from the
middle - (this is just to allow you to change the other one to have .bak at
the end). Press enter or click on some blank part of the screen for the
change to take effect.
Then, right click the one that doesn't have .bak at the end and click
"rename". Remove the .bak from the end and press enter or click anywhere on
some blank part of the screen to accept the change.
Then, right click on the one that now has .bk at the end, choose "rename"
and add the "a" back into the middle, so it now has .bak at the end. Press
enter or click on blank park of screen to accept the change.
Close the regedit window.

5. Click the Start Button and then "Restart".
It should work now, otherwise see link below -
http://support.microsoft.com/kb/947242

SOURCE: User profile cannot be loaded

Hi,

The instructiond were clearly givn in this link with images : 

http://www.vistax64.com/tutorials/130095-user-profile-service-failed-logon-user-profile-cannot-loaded.html

STEP ONE:

Logon to the Computer

NOTE : Go down the list here until you find a option that will work for you. 

1. Logon to another Administrator account. 
NOTE: If you do not have another Administrator account, then proceed to step 2.

A) Go to OPTION ONE or OPTION TWO.

2. Boot into Safe Mode. 
NOTE: You may not need to enable the built-in Administrator account. If this was the only normal administrator account you had, then Safe Mode should automatically boot into the built-in Administrator account. See: How to Start Vista in Safe Mode

A) If Safe Mode did not boot into the built-in Administrator account, then enable the Built-in Administrator account. If it did , then go to step 2C.
NOTE: See: How to Enable or Disable the Real Built-in Administrator Account in Vista

B) Logoff of Safe Mode, and then logon to the built-in Administrator account to logon with it in Safe Mode.

C) Go to OPTION ONE or OPTION TWO.


OPTION ONE:

Fix the User Account Profile

1. Open the Start menu.

2. In the white line (Start Search) area, type regedit and press Enter.

3. If prompted, either click on Continue or enter the password for the Administrator account.

4. In regedit, go to: (See screenshot below step 5)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

5. In the left pane, look for the S-1-5..... folder (SID key) with the long number that has .bak at the end of the numbers. 
(See screenshots below steps 6A and 7B)
NOTE: 
A) In the right pane, look at the ProfileImagePath to verify that this is the user account profile that has the error.
B) You may have another S-1-5..... folder (SID key) above it with the exact same number without the .bak at the end of it.

6. For Two S-1-5..... folders (SID key) with the same Number -
NOTE: This is if you have two S-1-5..... folders (SID key) with the exact same numbers, but the second (below) one has the .bak at the end of the numbers.
A) In the left pane, right click on the first (top) S-1-5..... folder (SID key) that does not have .bak at the end of the numbers and click Rename. (See screenshot below)
Repair.jpg
B) Add .bk to the end of the numbers. (See screenshot below)
Repair_bk.jpg
C) In the left pane, right click on the second S-1-5..... folder (SID key) with .bak at the end of the numbers and click Rename. (See screenshot above)
D) Remove only .bak from the end of the numbers and press Enter. (See screenshot below)
E) Now go back and Rename the first one with .bk to .bak now at the end of the numbers and press Enter. 
Repar_bak.jpg
F) Go to step 8.
7. For Only One S-1-5..... Folder (SID key) with .bak -
NOTE: This is if you only have one S-1-5..... folder (SID key) for your user account with .bak at the end of the numbers.
A) In the left pane, right click on the S-1-5..... folder (SID key) with .bak at the end of the numbers and click Rename. (See screenshot below)
B) Remove only .bak at the end of the numbers and press Enter. (See screenshot below and below step 10)
Repair_reg.jpg

8. In the right pane of the one without .bak now, right click on RefCount and click Modify. (See screenshot below step 10)
NOTE: If you do not have RefCount, then right click on a empty space in the right pane and click New and DWORD (32 bit) Value, then type RefCount and press Enter.
A) Type 0 (number) and click OK. (See screenshot below)
Modify_RefCount.jpg

9. In the right pane of the one without .bak now, right click on State and click Modify. (See screenshot below step 10)
A) Type 0 (number) and click OK. (See screenshot below)
Modify_State.jpg

10. The registry will now look like this for the one without .bak now. (See screenshot below)

Repair_Reg2.jpg

11. Close regedit.
12. Restart the computer.
13. See if you can logon now.





OPTION TWO:

Delete the User Account Profle

NOTE You can do this option if you do not care about losing the user account and the contents in the user folders. 

1. Delete the User account profile that this error is for.
NOTE: See: How to Delete a User Account in Vista

2. Open the Start menu.
3. In the white line (Start Search) area, type regedit and press Enter.
4. If prompted, click on Continue.
5. In regedit, go to: (See screenshot below step 7)
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

6. In the left pane, click on one of the S-1-5..... folders (SID key) with the long number in it. 
NOTE: It may have .bak at the end of it.
A) In the right pane, look at the ProfileImagePath to see if this is the same user account that you deleted in step 1 above.
B) Repeat step 6 until you find the one that you deleted in step 1 above.
NOTE: If the user account is not here, then it has already been removed when deleted in step 1. Go to step 9.
7. To Backup the Registry SID Key -
WARNING: You should backup this SID key to be safe in case you delete the wrong one in step 8 below.
A) Right click on the SID key, and click Export.
B) Type in a name and save the REG file to a safe location. 
NOTE: This is your backup. To Restore the Backup, right click on the REG backup file and click Merge.

C) Continue on to step 8.
SID_Reg.jpg

8. To Delete the Registry SID Key -
A) Right click on the SID key, and click Delete. (See screenshot above)
B) Click Yes to confirm deletion. (See screenshot below)
Confirm.jpg

9. Close regedit.
10. Now, just create a new normal Administrator account.
NOTE: See: How to Create a New User Account in Vista

11. Restart the computer, and logon to your new account.

Good Luck.

Live, Love, Laugh.

SOURCE: dell inspiron 1525 notebook

Dell inspiron 1525 notebook

SOURCE: Dell Studio Laptop- Cannot Log On Message- User

I had one case like this before where there was another user on the machine who loaded the user profile hive in the registry and then forgot to unload it. Therefore when the user tried to log in, it gave them the message just like yours because it's "in use" by the registry. If there is another user on your machine, please ensure that this person unloaded the hive in the registry. And then try logging in again. Please let me know if the problem persists. If my suggestion works, please do rate me. Thanks.

SOURCE: On booting up my Inspiron

Try logging in on the admin acct then delete and recreate the profile. If it doesn't work you can try switching off the comp then continously press F8 while turning on the comp and choose safe mode, then do a system restore.