Troubleshooting:backup did not complete - error 0x80070002

backup did not complete - error 0x80070002

Please read the issue.

I have a brand new Dell PC running Windows 7 Home Premium 64 bit.
Tried running a Windows 7 backup to an external hard drive.
The backup DID NOT complete.  It bombed.
I got the following error message:
System can not find the file specified
The backup location can not be found
0x80070002
Backup never completed at all.  Nothing on backup drive. 
No other messages.
Please do not give me some canned response about ingoring this for something about a custom libray under a user account.  I have read this "standard" response he many times.  This means nothing to me.  What custom library and where shoudl I be looking. 
What is a user account. 

Sorry I am not a techie. 
Just a novice with a brand new computer and Windows 7 that does not work.

Need help please. 
Need clear instructions.

Solutions to the Problem backup did not complete - error 0x80070002

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Hi ColoradoHi,
 
This problem is due to one or more profiles under: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList with missing ProfileImagePath.
To check whether you have missing profiles:
1. Click Start-> type regedit.exe to open regedit, navigate to the following registry key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList.
Expand the list.
2. Click on each of the profiles listed.
The first 3 profiles should have ProfileImagePath value of:
%SystemRoot%\System32\Config\SystemProfile, %SystemRoot%\ServiceProfiles\LocalService, and %SystemRoot%\ServiceProfiles\NetworkService respectively.

3. Starting from the 4th profile, the ProfileImagePath should contain path to the user profiles on your machine, such as C:\users\Christine
4. If one or more of the profile has no profile image, then you have missing profiles. 
To work around this, delete the profile in question (Caution: The registry contains critical settings that are necessary for your system to function properly.
Take extra caution while making changes)
1. First, export the ProfileList key for safekeeping.
(Right click on the key, choose “Export”, and save it to the desktop.)
2. Right click on the profile in question, choose delete.
3. Try backup again. 
Note: Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method.
These problems might require that you reinstall the operating system.
Microsoft cannot guarantee that these problems
can be solved.
Modify the registry at your own risk.
Modifying REGISTRY settings incorrectly can cause serious problems that may prevent your computer from booting properly.
Microsoft cannot guarantee that any problems resulting from the configuring of REGISTRY settings can be solved.
Modifications of these
settings are at your own risk.
Therefore, make sure that you follow these steps carefully.
For added protection, back up the registry before you modify it.
Then, you can restore the registry if a problem occurs.
For more information about how to back up and restore the registry, click
the following article number to view the article in the Microsoft Knowledge Base:
How to back up and restore the registry in Windows
KB322756 http://support.microsoft.com/kb/322756 
For more information visit the following link:
http://blogs.technet.com/filecab/archive/2008/03/12/common-causes-and-solutions-to-backup-system-restore-and-complete-pc-backup-problems-updated.aspx
You may also refer the following link which addresses similar issue:
http://social.answers.microsoft.com/Forums/en-US/vistahardware/thread/277bd7b1-9fc5-48f0-bc97-ffc77652faea
 
Regards,
Divya R – Microsoft Support.

Machine Throttling

• Go to the Start button.
• In the Search box, type "regedit" (without quotes) and press Enter.
• Look for the following registry key: "HKEY_LOCAL_MACHINE\SOFTWARE\ Microsoft\ SQMClient\Windows\DisabledSessions".
• On the right window pane, delete the subkey: "Machine Throttling".
• Reboot your system.

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