Think back over your life. Aren't there pivotal moments when you made a wrong move, moments you return to repeatedly? Wouldn't it be great if you could go back and do it all again, eradicate the mistake?
Now you can - at least with your Windows computer. Go Back (pound;55.99) will deal with rashes caused by software, viruses, and malevolent behaviour. You can go back for quite some time depending on how much space you have allocated to the program. Wildfile, who developed it, call it the missing part of the operating system and, of course, they are absolutely right.