Summary: I bought a Dell (Latitude-business) and was sent to HELL! 1. Repair disk utility did not work. A pro, level 2 tech spent 3 hours, trespassed into my attached external backup drive and permanently wiped out over 200,000 backup files. 2. Laptop replaced, same problem. 3. Hard drive replaced, same problem. [I later learned that problem is with a Dell file that interferes with MS 7 utility. Dell hasn't bothered to fix problem.] 4. Laptop went back to Dell HQ.