For users preferring Windows XP, it is possible to install XP Pro 32 or 64 bit on acer products in most instances. I recently converted an acer 7740G from Windows 7 to Windows XP Pro SP2 x64. Logically you need to back up all the data you want to restore after the conversion as well as determine what is inside your PC / laptop in advance, download the drivers for the platform you want to install (32 or 64 bit) and then install XP. It is also important to note if your BIOS have an option to change between IDE and AHCI mode for your hard drive controller, if no option is available you cannot install XP unless you integrate the appropriate AHCI driver with the NLite utility! However if you can locate the necessary drivers for the components in your PC and integrate the AHCI driver (if required) with NLite XP will function very well on most acer products.