Adobe Reader invalid plug_ins Folder

Adobe tech Department or anybody that may know the answer.
I am having more and more PC's coming up with the Adobe Reader Invalid Plug_ins when using adobe reader.
Now I know the fix for this, rename the folder, repair adobe, blah blah yes it works.
But my question is why, what is causing this issue?
is this a faulty install of the adobe Reader, faulty updates being pushed, etc???
I would like any information regarding this to permentantly resolve this issue, rather that keep patching each,
and every day for users.
Thank you

Probably - something is getting into the plug_ins folder:
C:\Program Files\Adobe\Reader 9.0\Reader\plug_ins
- One thing you can try when you have a system with the problem is to create a copy of this folder.
- Repair/Fix the problem
- Compare the plug_ins folder of the fixed machine with the folder that you saved in the first step.

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0x0409.ini                        5KB          Configuration Settings        2/18/2003
abcpy.ini                          2KB          Configuration Settings        3/24/2003
Adobe Reader 6.0.msi      2198KB     Windows Installer               5/19/2003
Data1.cab                       23334KB    WinZip file                         5/19/2003
instmsia.exe                   1669KB      Application                        3/11/2002
instmsiw.exe                  1780KB      Application                        3/11/2002
Rdr60ENU.itw                 16KB          ITW file                            5/11/2003
Rdr60ENU.mst               4KB            MST file                           4/16/2003
Setup.exe                      212KB        Application                        5/19/2003
Setup.ini                        2KB            Configuration Settings        5/19/2003
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There are some thoughts in the below (including what you've already tried):
http://discussions.apple.com/thread.jspa?messageID=7862484
Perhaps set permissions manually for PDFs?
/p

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Try doing the Update from the HELP TAB in the Reader program window...
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I have the same thing. I use Vista home Premium
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The error "invalid plugin detected. Adobe Reader will quit"

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in response to: (Jittu_Sharma)
Nov 16, 2008 10:37 AM in response to: (bruce628) Re: the error "invalid plugin detected. Adobe Reader will quit"
I followed your instructions
"You can find these in the "plug-ins" folder. [C:\Program Files\Adobe\Reader 9.0\Reader\plug_ins]"
I finally found my culprit, I deleted one file folder at a time, then restored them from my Recycle Bin.
I finally found my culprit, in the folder “Babylon” the file “BabylonRPI" was the main culprit.
I deleted the whole Babylon file folder, and havent had the error "invalid plugin detected. Adobe Reader will quit" ever since.
Thank you very much kid, you kept it simple, I am not a Techie either.

Why can't i download adobe reader on my windows vista. Error message is invalid key

I can not download Adobe reader. The installation begins, but then I get the message that the key is invalid. I don't know what means or how to correct it. How can I get a vaid key.

That is a problem caused by Microsoft or one of their recent updates. Here is the solution
in the Windows Explorer address bar type %APPDATA%
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Adobe Reader invalid plug_ins Folder

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