1 works fine.  1, blued screened with a hard drive failure.  This computer is rarely used in an office setting so it was a surprising failure.  I contacted the manufacture and they said it was past the 90-day warranty.  I guess if you want a crapshoot on whether your computer works for more than a few months, then this is the computer for you.  I purchase 20+ new computers a year for work and decided to give a refurbished a try.  I won't be purchasing one of these again.