A. Customers can claim refund or return within 7 days after receiving the package, in which case we can fully refund;
claim refund or return more than 7 days, we partially refund you.
B. If this is your problem, as the PC operating system is not compatible with the device, it cannot install or use, clients damage the device, clients get wrong to order etc. and you claim the refund or return, we only partially refund you.