cant open few things in windows 10

[WPCentral Question]

I am not able to open few applications and files directly. For example, i have pdf file downloaded on my desktop and i cant open it by clicking on it, instead i have to open my pdf software first by right clicking and run as administrator and then open the file from the pdf software. Same thing happens with ms office files and some other applications such as winzip. All of these apps wont open by left clicking them but instead i have run them as administrator. please help,thanks.

 

[Skamath]

I am not sure if this would help but are these files in the locations set to be open by the apps by default? (file association).The Pdf AFAIK open via the edge browser by default.