[ as a beginner pressed wrong tabs and miniturised all my programs now cannot read instructions as shown how do I undo this grave error

Depending on Manufacturer and Operating System (Windows XP, Windows 7, etc) of your laptop. HP laptops have a restore option when its first turned on. If you have a dell, it should have came with reinstallation CD. Another option to restore your computer (may not work but it's worth a try), at bootup press F8 Key, you'll get a boot up menu, here select Last Good Know Configuration.