"No printers are installed" printing from Excel via COM -

i have lotusscript code running in ibm domino 9.0 on 64-bit windows 2012 r2 server, uses com launch microsoft excel 2010, open workbook, print via pdfcreator (from pdfforge) convert workbook pdf.
ibm domino running service under system user, excel , pdfcreator run under user when started code.

this working fine until 2 days ago, pdfcreator started hanging on launch no reason i've determined.

one of admins customer reinstalled excel , pdfcreator, , deleted windows user profile (though don't know user). pdfcreator starting ok, there have been several issues excel.

i fixed excel issues changes code , os file system, problem when code tells excel print workbook, error occurs:

microsoft excel: no printers installed. install printer click file tab, , click print. click no printers installed, , click add printer. follow instructions in add printer dialog box.

this error occurs when trying print code.
can launch excel admin user , print manually, 3 printers (including pdfcreator) available in print dialogue-box.

it seems me printers not visible system user, have no idea how verify or fix this.
can it?

several bits of code follow. i've removed error handling , other things brevity.

the following code starts pdfcreator:

set pdfcreator=createobject("pdfcreator.clspdfcreator") if pdfcreator.cstart("/clearcache /noprocessingatstartup")     pdfcreator.cclearcache     pdfcreator.coption("printertemppath")=pdftmpdir     pdfcreator.coption("useautosave")=1     pdfcreator.coption("useautosavedirectory")=1     pdfcreator.coption("autosavedirectory")=pdftmpdir     pdfcreator.coption("autosaveformat")=0     pdfcreator.csaveoptions     pdfcreator.cdefaultprinter="pdfcreator" end if

pdftmpdir string variable containing directory path, set elsewhere in code.

these lines start excel:

set xlapp=createobject("excel.application") xlapp.visible=false

these lines open existing workbook , print it.

set xlbook=xlapp.workbooks.open(cebcmsheet) xlbook.printout ,,1,false,"pdfcreator"

cebcmsheet string variable containing full path xls file, set elsewhere in code.

i've been able fix editing registry on windows server.

i found printers listed admin user in "devices" , "printerports" children of registry key:
hkey_users\s-1-5-19\software\microsoft\windows nt\currentversion

i copied keys ".default" user, , code runs no errors.