You might be entitled to a refund for Microsoft Windows and any other related OEM software that may also be included if you have installed Linux, a BSD, BeOS, OS/2, Solaris, Novell NetWare or another computer operating system on a laptop, notebook or PDA, which came preloaded with Microsoft-Windows*. See the Windows Refund.org(http://www.windowsrefund.org/) and MS-Free-PC(http://www.msfreepc.com/) . There are even laptop manufacturers and resellers which offer machines without any pre-installed operating system.
To make your claim you may use the Microsoft-Windows Removal Certificate(http://linux.vandeplas.com/acer/winrefund.htm) available as PDF and OpenOffice SXW file.
Are you eager to remove the Microsoft label? Here are some instructions how to remove the Microsoft label.
These manufacturers offer laptops and notebooks without pre-installed MicroSoft operating system (note: these options are not available for all countries):
Windows-Tax Refund(http://www.fsfe.org/fellows/greve/freedom_bits/fosdem_followup_fellowship_section_on_reclaiming_windows_tax): A knowledge and experience repository on how to reclaim your "Windows Tax".