Ok, this is my first refurbished computer purchase.  So far I am satisfied.  The first thing to know is that these appear to be about 5 years old and just out of warranty (at least mine is). That said, I was able to register the device at Lenovo and download driver updates. Initial startup was without issue and suggested a clean (already registered) Windows 10 load.  Before I did anything else I downloaded Norton 360 and Malwarebytes.  Norton came back clean but there were two items found on malware scan and quarantined.  I then used the Cipher command to triple clean all blank space on the hard drive, just in case.  After that, Windows updates run and Lenovo driver updates.  The casing does not appear to be 5 years old (no smell and only minor wear indications).  Inside the unit is clean and dust free.  The hard drive and CPU fan appear to be new and the RAM likely is as well. (Appears to have two more spare slots if you want to add more RAM).  With an I7 processor and confirmed 512gb HD it is fast and very quiet. (So much so that I had to check to make sure the fan is running).  OVERALL: You are getting a $900 to $1000 computer for a third or less.  With refurb you are making certain sacrifices. but at least so far they do not appear to be serious.  Unless it dies in the near future unexpectedly, I anticipate getting 3 to 5 years out of this unit, perhaps more.  (The Gateway Quad Core it replaced lasted 13 years and was still running but so slow that it was time to upgrade).