For a few months, whenever I tried to open a PDF file, I would get the message "Adobe Reader failed to load its core DLL." In an effort to fix this, I deleted Adobe Acrobat/Reader from my computer and tried to redownload it. When I accessed the dowloader, it said the application was already installed. So I went into my program files and deleted everything that had to do with Adobe and Reader and tried again. Still, the installer told me that the application was already installed. But it's not anywhere on my computer and PDF files open to Chrome now. How do I download Acrobat again?