Mkuu hutapoteza documents kama ukichagua option ya ku-upgrade badala ya freshi install. But as a rule of thumb kama wewe sio mtaalamu wa haya mambo back up kwanza documents zako muhimu kwenye external drive, just case mambo yakienda mrama. Huwezi jua. turn your computer on. Kila kitu kikishafunguka na kutulia, then ingiza Win 7 DVD. A pop up will come up telling you to upgrade. But back kwanza documents zako muhimu uepuke kuja hapa tena baadae kuuliza how to recover the documents.