For /F "Tokens=1 delims=" %%I In ('reg query "HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionDevices" ^|find /I "WPL"') Do If "%%I"=="Printer WPL-606" Goto :EOF
REM Otherwise Do Stuff

Printer WPL-606     REG_SZ  winspool,Ne07:

For /F "Tokens=1,2 delims= " %%I In ('reg query "HKEY_CURRENT_USERSoftwareMicrosoftWindows NTCurrentVersionDevices" ^|find /I "WPL"') Do (
  If "%%I %%J"=="Printer WPL-606" (
     GOTO:EOF
  ) ELSE (
     REM Otherwise Do Stuff
  )
)

cscript "C:WINDOWSsystem32prnmngr.vbs" -l -s \localhost | FIND /I "WPL-606"
IF [%errorlevel%] == [0] (
  GOTO:EOF
) ELSE (
  REM Otherwise Do Stuff
)

For /F "Tokens=1,2 delims=" %%I In ('devcon.exe findall *WPL-606*') Do (
  If "%%J"=="PRINTERWPL-606" (
     GOTO:EOF
  ) ELSE (
     REM Otherwise Do Stuff
  )
)