I have a Toshiba Satellite M55-S135 (PSM50U-02L01C) laptop and forgot my password to get in

Here is the Link where you can see how to replace your hard drive in your laptop.
http://www.ifixit.com/Guide/Repairing-Toshiba-Satellite-M45-Hard-Drive/2769/1

But remember to remove your laptop battery before doing anything to your laptop.

and here is anothine link for user menual
http://tim.id.au/laptops/toshiba/portege%20t130%20satellite%20t130%20pro%20t130.pdf

Yikes. I'm not calling you a thief, but 99% of the time when you encounter a computer with a password on the hard drive and the possessor of the computer does not know the password, the computer is stolen.

http://forums.toshiba.com/t5/Drivers-and-Utilities/Drivers-for-satellite-m55-s135/td-p/129069

Hello,

The ialmnt5.sys file is a driver file for video cards. The best solution in this case is to reinstall the video driver.

Go to the manufacturer's support website to download the latest drivers for your device.

Here is the link for your laptop drivers : Satellite M55-S135 drivers.

Make sure to select the correct OS version to get compatible and working drivers.

Hope this helps.

open your laptop keyboard then try to clean it first, then try your keyboard
if did not fix your problem it mean you need to change keyboard with new one

open the screw under your laptop & then open the cover then there near your button cell on your motherboard there is a three pin sokit in in which two jack pin are plunged ,pull it out & plug it into thurd & second pin & again into second & first through which your laptpo will restart & your bios password will be broked

To remove the bios password you need to clear the CMOS.
Open your laptop casing look at your motherboard. locate the CMOS jamper it is near the battery. To clear remove the jamper and turn your computer on with in 5 to 10 seconds and turn it off. Reinsert the jamper back to there proper place and try to turn go to BIOS if there will be a password box appear.

You need to open your laptop and look at the motherboard and locate the CMOS battery. Just remove it with in 5 minutes to clear BIOS password.

http://www.irisvista.com/tech/laptops/ToshibaM55/laptop_LCD_screen_removal.htm
That should help you. Good luck and have a great day.

http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?ct=SB&os=&category=&moid=1209110&rpn=PSM50U&modelFilter=M55-S331&selCategory=3&selFamily=1073768663&selModel=1209110|PSM50U

plz check the manufacture website for the drivers