Purchased as a backup laptop for my work, used it a few times to make sure everything worked, which did at first, but when I did needed it for work (shortly after the warranty was up), it started freezing and crashing constantly!  Opened it up and discovered serious hardware issues.  The internal battery (dual batteries is a selling feature of this model) was replaced by a metal plate!! The CMOS battery was loose and flapping around inside!!! One of the RAM ports was corrupted!!!  And obviously other issues that I am not technically skilled enough to determine.  I also tried many different software fixes, different operating systems, etc, but it just keeps crashing, so most probably a hardware issue.  I reached out to the seller, but just got the hard line, out of warranty, too bad.  Do not buy from this seller! (By the way, I love the ThinkPad laptops, but find yourself a better seller.)