Boot multiple Windows Install ISOs from a USB drive. UFS 3 Twister Box fitted with HWK chip, is an unlocking and flashing tool for Samsung, Nokia Sony Erisson mobile phones. Backup Oem Activation Vista' title='Backup Oem Activation Vista' />Windows 7 OEM vs Retail Systems. OEM During online activation, it locks the product KeyOS to one computer I think the part it locks to is your motherboard, that could be wrong though, so that you cant install it on any other computer. OEM Configurator Portable Utility to Customize OEM Information and Logo in System Properties of Windows UPDATE New version 2. As far as I know, re installation is fine, unless youre replacing your motherboard AND hard drive. If you need to install to a new HD and mobo, well, you still might be able to do it, but expect to go through hell and back to get it working with the help of mircosoft costumer support. My Favourite Tv Program there. Retail A limited number of installations, however, you can install to multiple PCs but only one at one time. So say, if your uber. Gamer. Rig. 30. 00 is hit by a meteorite, and you build a new one, you can install your copy of retail windows on it. Q3bDh4ESM.png' alt='Backup Oem Activation Vista' title='Backup Oem Activation Vista' />I cannot however, install it on both uber. Gamer. Rig. 30. 00 and grannies. Subpar. PC at the same time. AFAIK, there is no other difference besides the type of license you get. OEM is somewhere between a bitch to reinstall, and impossible. Retail can be reinstalled, even on a new PC. Also, its technically illegal to put an OEM version of windows on a PC youre not building yourself.