PRB: Zetafax Printer fails to install (error -15) Print ZTN1598 ID: ZTN1598 This Zetafax technical note applies to: Zetafax v9 and later Symptom When installing the Zetafax Client, the install stops with an error message that reads: "Unable to install printer driver. -15" Cause The problem occurs on machines running Windows XP Service Pack 1 (SP1). Resolution The resolution to this problem is to first install the Service Pack 2 for Windows XP, and then install the Zetafax Client. The install error should not occur under Windows XP Service Pack 2 Status This has been identified by Equisys as a problem with the software versions given above. Last updated: 25/05/07 (PF/PJ) Keywords: Zetafax install printer driver error -15