Add every file in a folder to a Zip archive.
Delete every file in a folder tree more than 5 days old.
(Probably easier in VBscript) find the square root of a number by Newton's method.
Shutdown the computer.
Reboot the computer.
Create 100 text files each one 1000 bytes in size with consecutively numbered names in the format text0001.txt text0002.txt etc