@palomomorale
Is that password coming up at the middle of the screen after you press the power button? (see image below)
If it is, that's a BIOS password and somebody might have put a password on your machine. If you don't know who set it up (or it just magically appeared one day), you need to have that removed by calling Toshiba Support at 1-800-457-7777 (for US) and 1-800-663-0378 (for Canada).
If you tech savy yourself, follow the guide below on how to remove that BIOS password.
1. Turn the computer OFF.
2. Disconnect the AC adapter, and remove the battery.3.
On the bottom of the computer, remove the memory cover screw, the
memory cover, and the memory module(s) -- as shown in the photo below.
4. With the computer
oriented as in the photo above, carefully peel back the clear Mylar
film. Pull this film to the side enough to expose the JOPEN1 solder pads
(see photo below). It may be convenient to tape the film to the
computer's case. Do not remove the film completely, because it may be
impossible to re-attach it correctly.
5. Short the JOPEN1 solder
pads on the system board for 30 seconds. Needle-nose pliers or a
flat-blade screwdriver works well to short the jumper.
6. Re-position the Mylar film over the system board.
7. Reinstall the memory module(s), and re-attach the memory cover.
8. Re-insert the battery.
9.
Restart the computer to verify that the password prompt no longer
appears. If it does still appear, then repeat this procedure, starting
with step 1.
Good luck