Internet Explorer can open PDFs.?
I’ve found a few reasons for this, and this is an ongoing problem for a lot of people. The primaryh of the reasons is the use of specific Active X controls to open .pdf files in a web browser. Downloading then opening does not require the use of this Active X control. To open PDF files in a browser window, the ActiveX folder must contain the following files: AcroPDF.dll, AcroIEHelper.dll, and pdfshell.dll. The ActiveX controls should be located in: C:\Program Files\Common Files\Adobe\Acrobat\ActiveX If any of these files are missing, then repair Acrobat or Adobe Reader by choosing Help > Repair Acrobat Installation, or reinstalling the application.