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When you start the add printer wizard on windows 7 or windows server 2008 R2 (and probably windows 8 and windows server 2012) not all your printers are displayed in the list. But all printers are configured to be listed in Active Directory.

Solution:
It seems there is a default limit set to only show 20 directory printers in this list. You can change this amount with a Group Policy:

• Open Group Policy Management
• Add a new policy or edit an existing policy
• Browse Computer Configuration – Administrative Templates – Printers Add Printer wizard and edit Network scan page (Managed network)
• Enable the policy and change the value for Directory printers to a higher number. This is the amount of printers you will see in the list.

I ran into this problem on a Terminal Server configuration where the Adobe Reader X (AcroRd32.exe) process keeps using high if not all cpu capacity even after you close the program. After some searches I found this could be because the welcome screen that is opened when you start Acrobat Reader isn’t closed at all, the session stays active and keeps using a lot of cpu capacity.

Solution:
I could not found a fix for the problem at this time , but there is a workaround that solves the problem. You can disable the welcome screen from starting with a registry key.

1. Open the regedit and navigate to: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Adobe\Acrobat Reader\10.0\FeatureLockDown

2. Add a new key with the name: cWelcomeScreen

3. Add a DWORD value to the key: bShowWelcomeScreen with value 0

Now when starting Adobe Reader it will not start the welcome screen but also does not uses the high cpu.