"I have tried restoring it with the backup I made when I first booted it"
Since that didn't work means there is something inherent in the machine causing the problem. I would return it where I bought it. If it's too late for that, call Tech Support at 1-800-457-7777.
C.B.
C.B.
Toshiba Sat. L675D-S7016 Win 8 PRO 64 Bit---Toshiba Sat. L775D-S7132 Win 7 PRO SP3 64 Bit which also has Virtual Machine with Win XP SP3---Toshiba Sat. L305-S5921 Win Vista SP2 32 Bit