I want to install XP Pro SP3 with latest updates to a desktop with Core2Duo processor and Gigabyte motherboard. I checked out the repository and found the activation instructions bit confusing. Are there any pre-activated downloads available? I downloaded one from another website nomaher.com (please remove if I am not supposed to post external link, sorry). It supposedly contains all updates to July 2012. Installed well and no activation required. Only problem that it installs my DVD combo drive as CD-ROM and hence motherboard DVD not read. Also no .NET included which would have been nice. I also have a licensed XP Pro installed on one desktop. Can I deactivate that license and transfer to another machine? Can I deactivate the license, do a fresh install of XP with all latest updates and use my license key to activate it?