It takes a long time to open a PDF file when there is a smart card attached to the computer. This issue can occur regardless of whether the smart card is used in Acrobat/Reader.
Update to Acrobat 9.4.5, 10.1, or later.
When the smart card is attached to the computer, Acrobat detects there is a certificate available. It tries to validate the smart card by checking the certificate chain in the Acrobat and the Windows trust stores. There is a known issue in Acrobat where the algorithm performing this certificate check is inefficient and loops through the chain multiple times. Adobe has improved the performance of the certificate check. However, it has no influence over the other components that lead to the total delay where a smart card is inserted. There are also known delays in smart cards, the reading device and driver, and in the Windows trust store.
Following the high frequency of security updates related to Adobe Flash, there’s often a security update required for Adobe Reader or Acrobat. Flash is embedded in both of these products.
You may want to remove the Flash components file (authplay.dll) from Reader or Acrobat. When this file is removed, you can avoid applying the Acrobat/Reader security updates when it is a security issue exclusively in Flash. However, Adobe doesn’t support removing the authplay.dll from the installed plug-ins for any version of Acrobat or Reader. These products have not been tested in this form. Removing the authplay.dll file can result in unexpected behavior.
If you do remove authplay.dll, then make sure that you can reproduce any issues that arise on a standard Acrobat installation before contacting Adobe support. (A standard installation is one in which the authplay.dll file is installed.)
Here is a rough description of the possible behavior based on version:
- Reader and Acrobat 8 and earlier: Not relevant as Flash is not embedded in these versions.
- Reader and Acrobat 9: Possible to remove or rename authplay.dll. However, doing so can result in an application crash when rich media content is opened in Reader or Acrobat. (For example, when you open PDF portfolios, or PDF files with embedded rich media content)
- Reader and Acrobat 10: Not possible to remove or rename authplay.dll as the user interface itself contains Flash components. (Using protected mode avoids the security updates anyway)
- Reader and Acrobat 10+: it is still under discussion whether Adobe will offer the ability to disable or remove the Flash components from Reader or Acrobat.
If you are using a PenPad to sign PDF documents in Acrobat or Reader you will receive the following dialog after successfully signing the document:
You may wish to disable this dialog permamently to avoid it displaying to the end-users.
You can allow the dialog to appear once, and the users can then select the checkbox “Do not show this message again“. Alternatively you can add a registry key which will disable this dialog permanently:
HKCU\Software\Adobe\Adobe Acrobat\10.0\AVAlert\cCheckbox\cppklite\isignDone REG_DWORD, 1