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Try doing a &quot;Repair&quot; of Adobe Reader:<br />
<br />
Control Panel<br />
Programs and Features<br />
Select the Adobe Reader item<br />
There will be a &quot;Change&quot; link at the top - click it<br />
Choices will be Repair or Remove<br />
Select Repair and follow the prompts<br />
<br />
This should fix whatever got hosed in IE. Regards, Joe
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Try doing a "Repair" of Adobe Reader:

Control Panel
Programs and Features
Select the Adobe Reader item
There will be a "Change" link at the top - click it
Choices will be Repair or Remove
Select Repair and follow the prompts

This should fix whatever got hosed in IE. Regards, Joe

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For some reason my internet explorer 9 has stopped opening my online pdf documents. The a blank Windosw 7 windows opens with Adobe in the top right corner with nothing in it. <br />
I have:<br />
1.) checked all IE add ons and none of the adobe add ons are disabled<br />
2.) I download a pdf I cantopen in IE to my desktop &amp;&nbsp;I can open and read it<br />
3.) I check the event viewer but nothing has posted.
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For some reason my internet explorer 9 has stopped opening my online pdf documents. The a blank Windosw 7 windows opens with Adobe in the top right corner with nothing in it. 
I have:
1.) checked all IE add ons and none of the adobe add ons are disabled
2.) I download a pdf I cantopen in IE to my desktop & I can open and read it
3.) I check the event viewer but nothing has posted.

Why does my IE not open adobe pdf's now?

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

Windows 7 is an operating system from Microsoft. Features include multi-touch support, a redesigned Windows Shell with a new taskbar, referred to as the Superbar, a home networking system called HomeGroup, and performance improvements.

Windows 7

Web browsers are applications used primarily to display documents, files and media from the Internet, identified by a Uniform Resource Identifier (URI) that can be a page, image, video or other file. Some browsers require the use of add-ons or extensions to safely render the information they receive; others have systems built into them to perform the same functions.