Solved Remove "no name" user from login screen

[madmax2]

After install a program called DigitalPersona which is used to login to Windows by fingerprint ID
it has created an extra user on the logon screen.

This user has no name and is not listed in the Local Users and Groups > Users

I have since uninstall the software, but the user still remains on my logon screen.

How to remove it?

IF anyone wants to test this software, to replicate the problem...

Use this link...
HP Software and Driver Downloads for HP Printers, Laptops, Desktops and More | HP® Customer Support

Click software - security
Digital Persona Fingerprint Reader Software

 

[bigmck]

Give this tutorial a try.
http://www.sevenforums.com/tutorials/181036-user-account-delete.html

 

[madmax2]

Give this tutorial a try.
http://www.sevenforums.com/tutorials/181036-user-account-delete.html

Thanks for the link...

But the user is not listed in any of those options mentions in that thread.

It is just a clickable icon on the Logon screen.

IT has no name.

If u install that software I linked (e.g. in a VM) you will see what I mean.

 

[bigmck]

Give this tutorial a try.
http://www.sevenforums.com/tutorials/181036-user-account-delete.html

Thanks for the link...

But the user is not listed in any of those options mentions in that thread.

It is just a clickable icon on the Logon screen.

IT has no name.

If u install that software I linked (e.g. in a VM) you will see what I mean.

No thanks, I don't want to have your problem.

 

[madmax2]

Give this tutorial a try.
http://www.sevenforums.com/tutorials/181036-user-account-delete.html

Thanks for the link...

But the user is not listed in any of those options mentions in that thread.

It is just a clickable icon on the Logon screen.

IT has no name.

If u install that software I linked (e.g. in a VM) you will see what I mean.

No thanks, I don't want to have your problem.

I said install it on a Virtual Machine.
You can easily revert back to a previous saved state.

I just mean this user has no name and is not listed in the Users.
The only thing that shows it's existence is the icon in the logon screen.

 

[Pyprohly]

Hi Madmax2,

I’m interested in solving your issue. Thank you for providing a link to the problem software, however I’m unable locate this “Digital Persona Fingerprint Reader Software” software. Would you be able to provide a more direct link to the software?

 

[madmax2]

Pyprohly,

Click software-security to expand..

Download - Digital Persona Fingerprint Reader Software

 

[Pyprohly]

Pyprohly,

Click software-security to expand..

Download - Digital Persona Fingerprint Reader Software

That was not helpful. The only button on the page that includes the word “software” is a tab labeled “Software and Drivers” at the top of the page.

A more direct link would be preferable.

 

[madmax2]

Pyprohly,

Click software-security to expand..

Download - Digital Persona Fingerprint Reader Software

That was not helpful. The only button on the page that includes the word “software” is a tab labeled “Software and Drivers” at the top of the page.

A more direct link would be preferable.

Sorry...
I have tried to post the direct link here, but every time I tried to, I get "Error 500" message.

[/IMG]

 

[madmax2]

Pyprohly,

Click software-security to expand..

Download - Digital Persona Fingerprint Reader Software

That was not helpful. The only button on the page that includes the word “software” is a tab labeled “Software and Drivers” at the top of the page.

A more direct link would be preferable.

Ok I can post the direct link after I switched to another browser..

http://ftp.hp.com/pub/softpaq/sp43501-44000/sp43883.exe

 

[Pyprohly]

Okay, I’ve fiddled around with DigitalPersona long enough to realise that we are not dealing with actual user accounts here, but rather something known as credential providers.

I was not able to obtain your problem where the credential providers would persist after uninstallation of the DigitalPersona software, so I advise you try reinstalling the software package and uninstalling it again and hope that that rids the issue; though, I presume you’ve already tried this.

Other than that, I’m not too sure what else to suggest as these things aren’t designed to be removed manually…

At the very least, there are a few important registry keys, used by the software, worth analysing. Please run the below commands in a PowerShell console and upload the generated XML here.

$a = gci -r 'HKLM:\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication'
$a | Export-Clixml "C:\Users\$env:Username\Desktop\regAuthKey.xml"

Additionally, check that none of the following dlls exist in C:\Windows\System32 or C:\Windows\SysWOW64:

DPClback.dll
DPCrProv.dll
DPFPApi.dll
dpHFtrEx.dll
dpHMatch.dll
DpPwdFlt.dll
DPSDApi.dll

 

[UsernameIssues]

Excellent work Pyprohly! I added to your rep.

I too installed the app (inside of a virtual machine) the day that the original post was made. I too was unable to replicate the issue after uninstalling the app... so, I just lurked in the thread. I figured that not having the correct/needed hardware changes the experience. Maybe if we had the scanner, the app would further embed itself in the OS and not leave upon uninstall.

I'm not a big fan of HP software.

 

[madmax2]

Additionally, check that none of the following dlls exist in C:\Windows\System32 or C:\Windows\SysWOW64:

DPClback.dll
DPCrProv.dll
DPFPApi.dll
dpHFtrEx.dll
dpHMatch.dll
DpPwdFlt.dll
DPSDApi.dll

Thanks.

You are a legend!!

Deleting those DLLs solved my problem.
No more of that fingerprint icon on the logon screen.

It also solved another problem that I had, which I didn't know what the cause was..
Well now I know it caused by that software.

http://www.sevenforums.com/general-discussion/395863-cannot-press-enter-click-arrow-login.html

Note:
-BTW how did u trace what dlls/files were installed?

-Your assumption was correct, about me reinstalling and try uninstalling the software again.
If the solution was that simple, I would not to need to make a thread here.
The icon persists after uninstall if u had the actual hardware.
Maybe it locked those DLLs from being deleted as a security precaution.

I consider myself to be quite experienced with most of the windows problems, but this problem had me stumped.

-Just curious, but what do u do in your job? And do u have any IT qualifications?

 

[Pyprohly]

Deleting those DLLs solved my problem. […] It also solved another problem that I had

Two birds a stone. Excellent.

BTW how did u trace what dlls/files were installed?

Nothing extreme, really, just a bit of searching.

After locating the “Credential Providers” key under “HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Authentication”, you’ll find it expands to a list of subkeys, all with CLSID names. Each of them have a description as their default value, and four of these include the string ‘DigitalPersona’. I took note of their CLSIDs.

If you then search the registry by each of these CLSIDs, matching key names may be found under the HKCR hive. Contained within these keys is a value whose data references a path to a dll, so it can be inferred that credential providers are implemented through dlls. Because of this, I suspected that DigitalPersona didn’t uninstall properly on your machine, Madmax2, with the software’s dlls still lingering.

To find other relevant dlls, I inspected just one dll belonging to DigitalPersona and decided to conduct a file system search based off its metadata. I used PowerShell to do this:

gci C:\Windows\System32 -filter *.dll | ?{$_.VersionInfo.CompanyName -match 'DigitalPersona'} | select -exp FullName

The icon persists after uninstall if u had the actual hardware.
Maybe it locked those DLLs from being deleted as a security precaution.

Analogous to UNI’s speculation; I completely agree with your theory.

Just curious, but what do u do in your job? And do u have any IT qualifications?

Sorry to disappoint you like this, but I value my security on the Internet and will not reveal my real life occupation or qualifications at this time.