Acrobat X PDFMaker COM addin is NOT windows 7 64 bit compatible by default - fix???

I'm having an issue with the PDFMaker plugin in acrobat X across multiple sites and clients.

Common factor is:

Windows 7 64bit

Office 2010 32bit.

On ALL machines, the PDFMaker COM addin, whether in Word, Excel, Powerpoint or Outlook will regularly crash the Print Spooler Service (ie it becomes unresponsive). It needs to be PSKilled before it can be recovered.

Disabling the COM addins and the systems are perfectly stable until, somehow, the PDFMaker COM addin mysteriously re-enables itself.

For Microsoft Excel it re-enables each time Excel is launched.

Even if the load behaviour registry key below is set the autoenabling exists

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Office\Excel\Addins\PDFMaker.OfficeAddin] "LoadBehavior"=dword:00000000

To preempt useless suggestions:
1 - latest updates installed

2 - users are local administrators

3 - application was installed as the local administrator

I'd like to know how to permanently disable the PDFMaker COM addin in all office applications without it ever coming back from Adobe updates.

Cheers