Need to open laptop to pull out bios battery.

try this link http://pc-dl.panasonic.co.jp/dl/search?q=TOUGHBOOK+CF-18&button=&dc[]=002001003&p1=&p2=&oc=&lang=

Hi,

You can try to update the Bios . Download the bios drivers update in your computer's support site .

Hello there:
Here is a couple of links for this for you to consider
I know that ebay has them but here is a couple of diffferent places for you to look at

1. Hard drive for Panasonic cf18 - TabletPCBuzz - The Best Place to ... 3 posts - 3 authors - Last post: Aug 11Hard drive for Panasonic cf18 General Tablet PC Discussion. ... The ruggedness comes from the drive cage/caddy, not the drive itself. ...
   www.tabletpcbuzz.com › ... › General Tablet PC Discussion - Cached - Similar
2. Replacement HDD for Toughbook CF-18 - CNET Miscellaneous laptop ... 7 posts - 2 authors - Last post: Nov 6, 2007... HDD for Toughbook CF-18 - Get tips and advice on this topic, ... to purchase is a caddy (shopping for a good price), HDD,(naturally, ...
   forums.cnet.com/5208-7587_102-0.html?threadID=270788 - Cached - Similar

try driverguide.com

XP can not be installed from usb as the bios does not enable it. Plug the ide hard drive into an older desktop system and install from boot on cd. Once all files are copied over then you need to copy the i386 folder over from the cd. Reinstall the hard drive into the toughbook and carry on the install from there.

http://toughbookcentral.com/category/guides

hi there i have the same laptop with the password on it i have done all things to it but no good there one thing you can do for me tho can you send me the drivers disk plz

Toughbook CF18, CF-18
How to remove the BIOS Supervisor Password:

Open all covers and openings. Remove hard drive and battery. Remove bottom of notebook. Many many tiny screws.
Now look towards the rear of the notebook. You will see 2 plugs both have a red and black wires. The one with the much smaller wires and connector is the BIOS battery. Use a pair of needle nose pliers and remove this plug.

Leave it off for 5-15 minutes.

Leave the BIOS battery plug off. Replace the laptop's main battery. Leave the hard drive out. Turn the unit over and turn it on.
Press F2 when the screen comes up. POOF! NO PASSWORD!

Go to Security and disable the password. Save configuration. Turn off the notebook. Replace the small connector. Turn it back over and turn it back on. Press F2 and verify that there is no password. Go to Security and Disable the password again. Save the configuration.
Put the bottom back on. You're done.

NOW FOR THE BAD NEWS!!!
Your hard drive is now dead. Replace it. When a supervisor password is used it locks the hard drive to that password. There is NO WAY to recover the hard drive. It is called an ATA security password. Without the ATA password the hard drive is completely useless.

The BIOS may not support the larger drive at all; I suggest you look for a Toughbook forum and repost there and check Panasonic's site for a manual download and possibly a BIOS upgrade if the unit is equipped with a flash BIOS.   

i think the computer is asking for bios pc if it is bios then you have to open the case and remove the bios battery for five sec.before this you have to remove the power plug.after five sec. just resit the battery and put the power plug back and switch it on.
plz post your findings