This article is a list of required hardware and supported software for PGP Desktop 9.5.x.
Supported Email Client SoftwarePGP Desktop will, in many cases, work with Internet-standards-based email clients other than those listed here. PGP Corporation, however, does not support the use of other clients.
Instant Messaging Client CompatibilityPGP Desktop supports the following instant messaging clients when encrypting AIM instant messages, file transfers, and direct connections:
|Note: Continued interoperability with the AIM service may be affected by changes made to the underlying AIM protocols after PGP Desktop is released.|
PGP Anti-Virus Compatibility for Windows Desktop ClientsIn all anti-virus programs, enabling real-time scanning detects any viruses as the email or attachments are opened. Therefore, although it is recommended to disable email scanning for some of the anti-virus products listed below, your email is still being scanned and you are still being protected by your anti-virus product from viruses spread via email.Computer Associates eTrust EZ-Antivirus 7.x
Personal Firewall CompatibilityZone Alarm: The Zone Alarm firewall, by default, restricts access to localhost. Because PGP Desktop redirects connections to localhost, this stops PGP Desktop from working correctly. To fix this, add localhost (127.0.0.1) as a trusted IP address in Zone Alarm (on the Firewall/Zones screen). Email proxying by PGP Desktop will work normally once this is accomplished. 
Citrix CompatibilityPGP Desktop was tested with Citrix Presentation Server 4.0. The following features of PGP Desktop for Windows are available in a Citrix environment: