|I would recommend|
clicking on the start menu
click on run
then type cd \ (in command window)
(after this type in cd the letter of your flash drive(e,f,g,h,i ? :\)
then attrib -s -h *.*
then look back at your usb your files should be returned.
the .scr files are links to a virus file
right click on one, then select properties, then click on the shortcut tab, then click on the "find target"
reply if you dont mind as to the name of the target file, and where it is located, from there i will help you remove the infection.