Delete Definition and 53 Threads

This happened to my dad. When he turns his computer on, it now says "there is no operating system on this hard drive." What could have caused this? If he reinstalls windows, what can he do to ensure that this doesn't happen again?

I noticed this file in my C:\, 300 over megabytes, can I delete it and pose no harm to my system? :confused:

Delete a letter from the words below and then add a 3-letter word to them (doesn't matter where) to form a new word that matches the clues in the ( ). 1. Rich (to look; to ____) 2. Spite (a place you go to when you are on the internet) 3. Mite (to send; to ____) 4. Elf (to show what...