Initially disappointed with the computer due to persistent technical faults. Between E Buyer and Zoostorm it took overlong to agree a return to base. In the meanwhile different tech advisers handling the problems duplicated on-line solutions (failure to read the file fully) wasting time and causing much frustration. The repair was eventually executed well (although first response was "can't replicate the fault") and the hard drive was replaced together with memory (the latter twice!). I still very occasionally experience shut down on waking from sleep mode and the inevitable black screen. However, it is better although I would not buy / recommend Zoostorm again.