[THIN] All PCL inbox printer drivers become unsigned after you install the Microsoft .NET Framework 3.5 SP1 or XPS Essentials Pack in Windows XP or in Windows Server 2003

Anybody notice this problem <http://support.microsoft.com/kb/971314>? I
haven't yet.

Quote:

After you install the Microsoft .NET Framework 3.5 Service Pack 1 (SP1), XML
Paper Specification (XPS) Essentials Pack, or any hotfix package that
updates the Unidrv.dll file or other printer driver files on a computer that
is running Windows XP or Windows Server 2003, all Printer Control Language
(PCL) inbox printer drivers become unsigned.

In this situation, all PCL inbox printer driver installations fail.

I did notice this Citrix article<http://support.citrix.com/article/CTX120416>,
which points to a different Microsoft article
<http://support.microsoft.com/kb/961118>with a downloadable hotfix.

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