Change the Truecrypt password on your encrypted laptop.

Click on each bar to expand.

1. Open Truecrypt.

2. Change password on the System drive.

Click on "System drive" to highlight it.
Pull down the "System" menu and choose "Change Password..."

3. Confirm the old password and enter a new one.

Unless you know what you're doing, ignore the keyfiles.
Here are some suggestions for picking a good password.
Enter your current password; enter the new password twice, and press "OK".

4. Create entropy.

Move your mouse randomly for as long as you like.
When done, click 'Continue'.

5. Burn a new TrueCrypt Rescue Disk.

You will need this Rescue Disk to decrypt the hard drive in the event that Windows fails to boot.