My CMOS shows bad cheksum error. and Adminsitrator password will required when start pc. but I dont know how to reset Toshiba Satellite A215-S7444 phonix bios. plz send me an instruction how to reset bios password>

Reset toshia windows password,three methods for you.

Method 1: Unlock Windows login password with Windows password reset disk.

Method 2: Unlock Windows password with Windows built-in Administrator account.

Method3: Unlock Windows password with commercial and professional Windows password reset tool.

Details in http://www.windowspasswordreset.net/article/unlock-windows-password.html

What are you trying to do? Replace the CMOS battery, or reset a BIOS password?

This is what the CMOS battery looks like,

http://www.ebay.com/itm/CMOS-RTC-Battery-Toshiba-Satellite-A210-A215-Series-/270970735656?_trksid=p4340.m263&_trkparms=algo%3DSIC%26its%3DI%252BC%26itu%3DUCI%252BIA%252BUA%252BFICS%252BUFI%26otn%3D15%26pmod%3D160437620636%26ps%3D63%26clkid%3D8748715535548215160


Now view this pictorial disassembly guide,

Page 1 - http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/laptop-disassembly-1.htm

Page 3 - http://www.irisvista.com/tech/laptops/toshiba-satellite-a205/laptop-disassembly-3.htm

Go to the photo in Step 17, and click on it to enlarge.
See the CMOS battery in the middle/left?

Round silvery looking object. Go straight down from the red arrow to the far left.

That is how to access the CMOS battery.
(Yes I know it states Satellite A200/A205. Same for the A215)

Now BIOS password reset?
Do not know where the two copper pads are to briefly short out. Suspect under the Ram Memory modules, (And under a small sheet of Mylar plastic), or under the Wireless Modem. (And under a small sheet of Mylar plastic)

The links on this solution I gave may help,

http://www.fixya.com/support/t6645137-toshiba_l500_clear_cmos

For additional questions please post in a Comment.
Regards,
joecoolvette

[ Am I concerned that you may have stolen the laptop, or are trying to break into someone else's laptop?
NO
Your real name, and IP address are recorded on FixYa, to give to the authorities, if needed.

I figure a thief would not risk this ]

If it's the BIOS password then no, only a Toshiba dealer can reset it. If it's a Windows password then use this
http://pogostick.net/~pnh/ntpasswd/

Manufacturers sometime put BIOS passwords to protect system changes that may affect your notebook. To reset the BIOS password read the information from this link.

In case of your notebook the easiest method would be using software from Hiren's Boot CD as it's pretty hard to open it up and reach for the CMOS battery or the jumper and I wouldn't recommend doing it especially if it's under warranty.

If your computer didn't make it to your Windows login.Sounds like it is wanting your BIOS password try "0000"

You can either find the CMOS backup battery and take it out for a while to let the memory discharge, or look online to find a program which will crack the Phoenix password (these do exist, I had to use them when I was in business fixing computers).

Contact Toshiba Support, If you are the Original or Registered owner of that system, they can help u. They have the "Master Password"

You need to remove the CMOS battery from the motherboard to reset the password.

It will be on the main board of laptop. You need to open the base and keyboard of laptop. Careful