Backup error due to System Writer missing (enumeration of system32 printer dlls takes too long)

Hi,
On a Windows 2008 R2 we get a Windows Backup error while backupping System State (event id: 5, error code: '2155347997').
We tried *ALL* solutions found on Internet regarding the same issue (and we also applied the suggested hotfix KB2807849) but without success. So we DIGGED INTO VSS to see what is happening.
***1) First we saw that an USB printer had a problem and this resulted in
hundreds of entries in the following registry keys:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StillImage\DeviceNameStore\Canon MF6500 Series #100010]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StillImage\DeviceNameStore\Canon MF6500 Series #100011]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StillImage\DeviceNameStore\Canon MF6500 Series #100012]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StillImage\DeviceNameStore\{6BDD1FC6-810F-11D0-BEC7-08002BE2092F}\79590]
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\StillImage\DeviceNameStore\{6BDD1FC6-810F-11D0-BEC7-08002BE2092F}\79591]
***2) We completely removed ALL drivers/devices related to that printer (now the DeviceNameStore is empty and
pnputil -e returns no driver related to the printer)
***3) Using process monitor we saw that during vssadmin list writers the system is searching for the DLLs related to that printer AND SEEMS CAUGHT IN AN ENDLESS LOOP: this is an excerpt of the scan:
09:56:34,5205954    svchost.exe    324    RegSetValue    HKLM\System\CurrentControlSet\services\VSS\Diag\System Writer\IDENTIFY (Enter)    SUCCESS
09:57:18,2310377 svchost.exe 324 QueryDirectory C:\Windows\System32\spool\drivers\color\cnz005.icc NO SUCH FILE Filter: cnz005.icc
09:57:18,2312877 svchost.exe 324 QueryDirectory C:\Windows\System32\spool\drivers\color\cnf6500m.icc NO SUCH FILE Filter: cnf6500m.icc
09:57:18,2314854 svchost.exe 324 QueryDirectory C:\Windows\System32\cncmfp20.ini NO SUCH FILE Filter: cncmfp20.ini
09:57:18,2316416 svchost.exe 324 QueryDirectory C:\Windows\System32\cnclsi20.dll NO SUCH FILE Filter: cnclsi20.dll
... and so on
.... THE SAME FILES ARE REPEATED HUNDREDS OF TIMES!!!! ...
It seems that somewhere there is a catalog of system files which still contains the references to the (same) files used by the hundreds of devices that WERE present in the DeviceNameStore (see point ***1 above, but now it is empty),  and the System
Writer continues to search/enumerate those files and fails.
How can I fix it ? Is there a way to "reset" the System Writer and "rebuild" (???) the correct files that it should backup? (in order to complete a successfull system state backup)
Can you help me?
Thank you in advance.
EDIT: some additional (useful?) information:
* we also ran chkdsk /f C: 
* sfc /scannow completes without errors
* in the vssadmin list writers the "system writer" is missing (but - as said above - when we run it the associated process repeatedly search printer dll files in the System32 directory)
* perhaps those file are contained is some filemaps catalog ?!? Is there a way to "reset" them?!?
***EDIT 2***:
I found that the reference to those missing DLLs are in ***C:\Windows\inf\setupapi.ev3*** but if I move the file away the System Writer continues not being listed in vssadmin list writer (though the vssadmin command complete very fast).
This is what is happening:
svchost.exe    324    CloseFile    C:\Windows\inf    SUCCESS    
svchost.exe    324    CloseFile    C:\Windows\System32\DriverStore\infpub.dat    SUCCESS    
svchost.exe    324    CreateFile    C:\Windows\System32\DriverStore\infpub.dat    ACCESS DENIED
svchost.exe    324    CreateFile    C:\Windows\System32\DriverStore\infstor.dat    ACCESS DENIED
svchost.exe    324    CreateFile    C:\Windows\System32\DriverStore\infstrng.dat    ACCESS DENIED
svchost.exe    324    CreateFile    C:\Windows\System32\DriverStore\drvindex.dat    ACCESS DENIED
svchost.exe    324    CreateFile    C:\Windows\System32\DriverStore\INFCACHE.0    NAME NOT FOUND
svchost.exe    324    CreateFile    C:\Windows\System32\DriverStore\INFCACHE.1    ACCESS DENIED
svchost.exe    324    CreateFile    C:\Windows\System32\DriverStore\INFCACHE.2    NAME NOT FOUND
svchost.exe    324    CreateFile    C:\Windows\inf    SUCCESS
svchost.exe    324    QueryBasicInformationFile    C:\Windows\inf    SUCCESS
svchost.exe    324    RegCloseKey    HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Setup    SUCCESS    
svchost.exe    324    CreateFile    C:\Windows\inf\setupapi.ev1    SUCCESS
svchost.exe    324    QueryStandardInformationFile    C:\Windows\inf\setupapi.ev1    SUCCESS
svchost.exe    324    CreateFileMapping    C:\Windows\inf\setupapi.ev1
svchost.exe    324    QueryStandardInformationFile    C:\Windows\inf\setupapi.ev1    SUCCESS
svchost.exe    324    CreateFileMapping    C:\Windows\inf\setupapi.ev1
svchost.exe    324    CreateFile    C:\Windows\inf\setupapi.ev2    SUCCESS
svchost.exe    324    QueryStandardInformationFile    C:\Windows\inf\setupapi.ev2
svchost.exe    324    CreateFileMapping    C:\Windows\inf\setupapi.ev2
svchost.exe    324    QueryStandardInformationFile    C:\Windows\inf\setupapi.ev2    SUCCESS
svchost.exe    324    CreateFileMapping    C:\Windows\inf\setupapi.ev2
svchost.exe    324    CreateFile    C:\Windows\inf\setupapi.ev3    SUCCESS
svchost.exe    324    QueryStandardInformationFile    C:\Windows\inf\setupapi.ev3
svchost.exe    324    CreateFileMapping    C:\Windows\inf\setupapi.ev3
svchost.exe    324    QueryStandardInformationFile    C:\Windows\inf\setupapi.ev3
svchost.exe    324    CreateFileMapping    C:\Windows\inf\setupapi.ev3    SUCCESS
svchost.exe    324    CreateFile    C:\Windows\System32\drivers    SUCCESS
svchost.exe    324    QueryDirectory    C:\Windows\System32\drivers\acpi.sys    SUCCESS
svchost.exe    324    QueryDirectory    C:\Windows\System32\drivers\rdpbus.sys    SUCCESS
svchost.exe    324    QueryDirectory    C:\Windows\System32\drivers\i8042prt.sys    SUCCESS
.... EVERYTHING IS OK UP TO HERE ...
svchost.exe    324    CloseFile    C:\Windows\System32\drivers    SUCCESS
svchost.exe    324    CreateFile    C:\Windows\System32    SUCCESS
svchost.exe    324    QueryDirectory    C:\Windows\System32\cncc6500.dll    NO SUCH FILE    Filter: cncc6500.dll
svchost.exe    324    QueryDirectory    C:\Windows\System32\cnci6500.dll    NO SUCH FILE    Filter: cnci6500.dll
svchost.exe    324    QueryDirectory    C:\Windows\System32\cncc6500.dll    NO SUCH FILE    Filter: cncc6500.dll
svchost.exe    324    QueryDirectory    C:\Windows\System32\cnci6500.dll    NO SUCH FILE    Filter: cnci6500.dll
... !!!!!GET CAUGHT IN AN ENDLESS LOOP!!!!!!!! (System Writer probably ends for timeout)...
Is there a way to rebuild/modify that file C:\Windows\inf\setupapi.ev3
Perhaps I can delete the catroot2 directory?

Hi,
Please check if there are number of files in Temporary ASP.NET folders under "C:\Windows\Microsoft.Net\Framework". If so, clear these files then restart the server to check the results.
In additional, you could try the steps below to troubleshoot the issue:
1. Give NETWORK SERVICE Read permissions on COM+ Event System.
a. Open the registry editor and navigate to HKLM\CurrentControlSet\Services\EventSystem.
b. Right click on the EventSystem and then select ‘Permissions’
c. Click on ‘ADD’ button and then type in ‘NETWORK SERVICE’ and give it READ permission.
d. Reboot the machine and then run the 'VSS admin list writers' to check if it shows up the 'system writer'.
2. If the step 1 doesn't work then move the contents of C:\Windows\winsxs\FileMaps to an alternate location. Then run the command 'VSS admin list writers' to check if it shows up the 'system writer'.  Is so, some of those files maybe corrupted and we
need to identify them and replace the files from a healthy machine.
Regards,
Mandy
We
are trying to better understand customer views on social support experience, so your participation in this
interview project would be greatly appreciated if you have time.
Thanks for helping make community forums a great place.

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