PDFCreator and PrimoPDF both fail to install

Hi

I am unable to reinstall PDFCreator (PrinterHelper stopped responding) or PrimoPDF (error 1798) on Windows 7 32bit PC,
ever since applying the following instructions (posted here):

Before starting, backup your registry (and system).  Don't bother trying to use the File --> Server Properties --> Driver --> Remove function; it won't work.  Instead, reboot the machine into SAFE mode.

1) Go to C:\Windows\System32\spool\drivers\x64\ --> Delete All the files

2) Go to C:\Windows\System32\spool\drivers\W32X86\ --> Delete All the files

3) Optional (really for x86 systems), Go to C:\Windows\System32\spool\PRINTERS --> Delete All the files

4) This step involves the Registry --> Back up the registry and/or the keys you delete should you need them!!

5) Open Regedit

6) Go to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Printers

7) Delete ALL the sub keys

8) Go to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows x64\Drivers

9) Delete ALL the sub keys

10) Go to Computer\HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows x64\Print Processors --> Delete ALL the sub keys

11) Close Registry Reboot

12) Go to "Turn Windows features on or off" in the control panel

13) Uncheck "Windows Fax and Scan"

14) Reboot

15) Go to "Turn Windows features on or off" in the control panel

16) Recheck "Windows Fax and Scan"

17) Reboot

At this point you should have a stable print spooler.

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All this because Firefox prints blank pages whatever site page I try to print to the user's Xerox printers; the same result was obtained when creating a PDF with PDFCreator. Incidently the print preview was perfectly normal.

Any ideas ?

thanks
yann