There are ways to remove the password (or identify the password) on any windows based computer, but we cant help you with that as it is against the rules.
If you want to keep windows (don't know why on a laptop anyone would, except netflix), then all you can do is reinstall. You may not need a disk for it, as there is generally a restore partition on the hard drive for reinstalling at a later point. To get to it, you will need to find the documentation for your laptop. You could also install Ubuntu in a small partition and use the vista loader from the grub menu that it installs to get to the restore partition.
My advice would be to boot nuke the drive, format to EXT4 and set up a Linux install. That is the safest, fastest, longest lasting solution. Just don't loose you password as the only way back in is a reinstall.