Where are these printers coming from in "Devices and Printers?"

It appears to be a bug/problem with "Client Side Rendering" of print jobs in Windows IF the user profile is deleted through a mechanism like Delprof or the Delete user profiles older than a specified number of days on system restart GPO.

What I see is that the printer connections for each user are stored here: Computer\HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Providers\Client Side Rendering Print Provider

These settings are reapplied to a user account when they login even after the profile has been deleted through one of the above mechanisms. So, previously installed printers reappear. These have been referred else where as "Ghost Printers" or "Phantom Printers."

We use the "Delete user profiles older than..." GPO in our PC lab to keep them somewhat clean from all the different users logging in. So, within this same policy I applied the fix mentioned in other places on the internet. Create 4 new registry entries with GPO:

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Print\Providers\Client Side Rendering Print Provider] 
"InactiveGuidPrinterAge"=dword:00000384 

"ActiveGuidPrinterAge"=dword:00000384

"InactiveGuidPrinterTrim"=dword:00000384

"RemovePrintersAtLogoff"=dword:00000001

A reboot of the computer and when the user logs in the old printers are gone.

In addition, I believe this is directly related to a problem where the printers would not deploy many times on the first login of a user. The printers will only apply after logging off and logging back in, or using gpupdate. The primary error recorded in the Application Event Log is The user '<printer name>' preference item in the 'Connect Printers {<GUID>}' Group Policy Object did not apply because it failed with error code '0x80070057 The parameter is incorrect.' This error was suppressed.

So far, I have tested several scenarios and both the issues are resolved. In essence, if the user has previously logged on to the computer but the profile has since been deleted, they will have problems with old printers showing up and/or printers not connecting on first logon due to the problems described above.