1. I regularly backup all my data from all my computer systems and have a vault full of properly indexed backup media. 2. Both the American and British political systems are shinng examples that should be copied by the rest of the world. Cough splutter 3. Pi can be reliably calculated using a 3-4-5 right angle triangle ... and a 22 foot long slide rule.
Your problem will be fixed simply by reinstalling 15 different drivers and rebooting the system in "I don't give a s**t about the disk" mode and restoring the previous version of your valuable data file using the DOS FORMAT command.