Try a System Reset, Felipe. Turn off computer. Remove all attachments and battery. Press and hold the Power button for 15 seconds. Attach Power and insert battery. Start computer and tap F2 at the Toshiba splash screen to get in BIOS. Press F9 to setup system defaults. Answer Yes. Press F10 to Save Configuration Changes and Exit. Answer Yes to complete the process. The computer will restart.
If you post back here again, please give your COMPLETE model info as in my examples below.
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