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Should just be a matter of resetting the file type association. &nbsp;One method as follows...<br />
<br />
1. Right-click on any PDF document<br />
2. Select &quot;Open with&quot;<br />
3. Select &quot;Choose default program...&quot;<br />
4. Browse to the Adobe 9 exe<br />
5. Make sure the checkbox is ticked for &quot;Always use the selected program to open this kind of file.&quot;
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Should just be a matter of resetting the file type association.  One method as follows...

1. Right-click on any PDF document
2. Select "Open with"
3. Select "Choose default program..."
4. Browse to the Adobe 9 exe
5. Make sure the checkbox is ticked for "Always use the selected program to open this kind of file."

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Sorry, I wasn't clear. I need a way to make this change on multiple comptuers. I can push out a fix via SCCM maybe a registry tweak or something.
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Sorry, I wasn't clear. I need a way to make this change on multiple comptuers. I can push out a fix via SCCM maybe a registry tweak or something.

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Gotcha. &nbsp;Yes - you'll want to set the following String Value in the registry:<br />
<br />
Computer\HKEY_CURRENT_USER<wbr />\Software\<wbr />Microsoft\<wbr />Windows\Cu<wbr />rrentVersi<wbr />on\Explore<wbr />r\FileExts<wbr />\.pdf\User<wbr />Choice<br />
<br />
<b>Value Name: </b>Progid<br />
<b>Value Data: </b>Applications\AcroRd32.exe &nbsp; &nbsp; (confirm this value from a correctly working machine)<br />
<br />
<br />
This is from a Win7 Pro machine. &nbsp;Confirm on your OS version(s).
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Gotcha.  Yes - you'll want to set the following String Value in the registry:

Computer\HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Explorer\FileExts\.pdf\UserChoice

Value Name: Progid
Value Data: Applications\AcroRd32.exe     (confirm this value from a correctly working machine)


This is from a Win7 Pro machine.  Confirm on your OS version(s).

nps.reg

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That worked. Thanks for your help.
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Another PDF viewer was installed on multiple PCs and it is now the default. How can I revert back to Adobe Reader 9 being the default?
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Another PDF viewer was installed on multiple PCs and it is now the default. How can I revert back to Adobe Reader 9 being the default?

Set Adobe 9 as the Default PDF viewer on multiple computers

Adobe Acrobat is a family of application software and Web services developed by Adobe Systems to view, create, manipulate, print and manage files in Portable Document Format (PDF). The family comprises Acrobat Reader (formerly Adobe Reader), Acrobat (formerly Acrobat Exchange) and Acrobat.com. The commercial proprietary Acrobat, available for Microsoft Windows and OS X only, can also create, edit, convert, digitally sign, encrypt, export and publish PDF files.

Adobe Acrobat

Microsoft Windows XP is the sixth release of the NT series of operating systems, and was the first to be marketed in a variety of editions: XP Home and XP Professional, designed for business and power users. The advanced features in XP Professional are generally disabled in Home Edition, but are there and can be activated. There were two 64-bit editions, an embedded edition and a tablet edition.