Hi Ben9000,
Welcome to Microsoft answers!
This symptom occur because a 64-bit process that runs on a computer that is running an x64-based version of Windows cannot load the 32-bit .dll files that are required by some program features.
You may try the following work around:
You must use the 32-bit version of Windows Explorer. The 32-bit version of Windows Explorer is located in the %windir%\Syswow64 folder on the computer that is running an x64-based version of Windows.
To use the 32-bit version of Windows Explorer, follow these steps:
Click Start, click Run, type the following in the Open box, and then click OK:
Drive_Letter :\windows\syswow64\explorer.exe /separate
Note The placeholder Drive_Letter represents the drive where the x64-based version of Windows is installed.
For more information:
Some Windows Explorer extensions and some Control Panel items are not displayed on computers that are running an x64-based version of Windows
http://support.microsoft.com/kb/895561#appliesto
Now check if the issue is resolved.
You may want to try the following steps:
PDF thumbnail view via the Acrobat reader:
- Run Acrobat Reader. In Reader, click File > Open and navigate to the folder(s) containing your PDF file(s). If necessary, move the slider to show all your PDF files.
- Cancel out of Open and exit Reader.
- Open Windows Explorer and navigate to the folders(s) containing your PDF file(s).
- Click Views and move the slider until you see PDF thumbnails.
Thanks and Regards:
Ajay K
Microsoft Answers Support Engineer
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