by nakitakona » 23 Jan 2016, 00:04
There are two issues concerning your problem as far as I am concern. In the first place, your SD has been infected by virus and second your PC has no apps or program that could display the thumbnail format of your pictures. Usually it the picture editor or built-in program to read images/pictures from your computer or from your USB or memory card.
By the way, you said the size of your picture is too large to display, it is because the virus has added more characters or whatever so that it could be difficult to read or open and display its thumbnail.