In Acrobat and Reader X, Adobe introduces the Welcome Screen feature, which lists recent files viewed when you open a blank Acrobat or Reader window.
However, in Acrobat amd Reader X (version 10.0 – 10.1) for Windows, there was no option to hide the Welcome screen.
Note: Acrobat and Reader X (version 10.0) for Mac OS X has a user preference to hide Welcome screen.
In the Acrobat the Reader X (version 10.1.1) update, Adobe has added the capability to hide the Welcome screen for Windows, via the Windows registry.
Disclaimer: This procedure involves editing the Windows registry. Adobe doesn't provide support for editing the registry, which contains critical system and application information. Make sure to back up the registry before editing it. For more information about the registry, see the Windows documentation or contact Microsoft.
/Root/10/AVGeneral/ShowWelcomeScreen/ Item 0 = Number = 0 Item 1 = Boolean = √