Lenovo recommends Windows.
 
 
To initiate a return, fill out this form to obtain a Return Merchandise Authorization (RMA). Lenovo will accept the return or exchange of a product in its original package for a full refund in cases of Lenovo error. Returns allowed for any other reason will be subject to a restocking fee equal to 15% of the purchase amount. All returns must be initiated within 30 days of the invoice date.
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System is defective
I would like a replacement