1 Hold down "Control" to select whatever pics to wish to delete.(Ramdon
select).
Right-click on one of them, delete all the selections.
2 Or, click on the first picture, hold down "Shift" as you are doing that,
scroll to the last photo that you want to delete, click on it while still
holding down "Shift", and everything will be selected inbetween 1st and last
clicks. Right-click anywhere on the selections and select delete. So, you
still have to click OK again!
3 Open up Windows Explorer, click on pictures to open the albums in the
right-hand pane, go to "Edit" in the tool bar across the top, click "select
all". Right-click, delete.