Question

I have been unable to view certain PDF files I download from a stock market newsletter I receive. I reinstalled the latest online version of Adobe Reader to no avail. Some interesting aspects of this are as follows: I regularly download and view PDF files from other sources, I was able to view tw smaller PDF from the same source. When they emailed me the PDFs I received them but could not open or view them. I can download and view smaller PDF files from the same source, and I was able to download and view the problem files on another computer I have. When I try to open them it appears to start, showing a dark line on the left side of the screen, but is soon replaced by a blank white screen with the file name on a blue line at top, nothing more seems to happen although the hourglass appears on the blank screen. I can download and view smaller PDF files from the same source, and I was able to download and view the problem files on another computer I have. What could be the problem