permission denied to run applications

[sleepless]

why do i get the message "windows cannot access the specified device path or file..." when trying to execute a file? i am the only user and administrator of this pc. i have tried disabling the av but that does nothing. it also doesn't matter where the file is located. for example, i'm trying to run the adobe flash installer and it wont let me. this is frustrating.

 

[sleepless]

ok, so i 'took ownership' of the folder and that worked. is this what i have to do for every folder on this pc? that seems strange since i am the administrator and only user.