It is trying to preload the whole PDF and render a tiny little thumbnail for you. That's just dumb. Here's how to disable it.
Remove AcrobatInfo.exe (Acro 7) from Windows Explorer - here's how
AcrobatInfo.exe is used to detect the info stored in a pdf file and return it to the user. Unfortunately, it eats too many computer resources and you can't simply rename it, first, because the installshield installer will detect the change and try to re-install acrobat and second, because, even if you rename it, windows explorer still tries to call it, so you would still lose computer resources. you can notice it, if you use the programme Filemon by Winternals - even if AcrobatInfo.exe can't be loaded, windows explorer still tries to read the streams stored in a pdf file. If you don't have Filemon, rename AcrobatInfo.exe to something else and enter a directory with a pdf file in it. There will be a small interruption when you enter the folder and also when you select the pdf file with your cursor. the mouse cursor will change to busy. And we don't want our computers to get too busy, right? so here's how you remove it:
first, the registry keys. before applying the following reg files to the registry, don't forget to backup the original keys, in case you wanna restore this function. the following changes will remove the installshield installer key and all keys responsible for the AcrobatInfo function:
Basically, you want to delete the first four keys, and delete the last two values that tell Acrobat to BrowseInPlace...
For me, the Internet Explorer key didn't exist...
[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Installer\UserData\S-1-5-18\Components\21C0FC0AB3C24344FB30C34266AA5E09]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Classes\CLSID\{98D9A6F1-4696-4B5E-A2E8-36B3F9C1E12C}]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\AcrobatInfo.exe]
[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\Low Rights\ElevationPolicy\{AC76BA86-1033-0000-7760-000000000002}]
[HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AcroExch.Document]
"BrowseInPlace"=-
[ HKEY_LOCAL_MACHINE\SOFTWARE\Classes\AcroExch.Document.7]
"BrowseInPlace"=-
Now you have to unregister the Windows Explorer Extension pdfshell.dll located in Acrobat\ActiveX. This will remove the PDF tab in pdf files properties menu of windows explorer. You won't need it; if you don't remove it, it will contain nothing, since AcrobatInfo.exe sends no info any longer. to unregister, type:
regsvr32 pathTo\pdfshell.dll /u
on my system, the path was:
C:\Documents and Settings\Ron Yeh>regsvr32 "C:\Program Files\Adobe\Acrobat 7.0\ActiveX\pdfshell.dll
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