It will remove your ACER OS recovery partition from the Master Boot Record but it can be restored.
Windows Vista is possible to install on the Acer One Netbook. It must be a 32bit version.
Many can be found on the net if you look hard enough or go buy a copy. To start you must setup the
USB Stick to become Bootable. To do this first use a Computer that uses Vista and enter into dos mode
by using the CMD command. In this mode use the DISKPART command. Follow these commands
Sel Disk # ( the disk # will be your USB drive)
Create par primary
Then use an installation disk for Vista (not an iso file) and copy all files to the USB drive.
To boot to USB on the Acer simply press "f12" while booting up and choose USBHHD option and there you go.