Hello everyone, sorry for my bad language (spelling) but I want to ask one a question which I find no answer!?? If i liked my trial version and I want to buy it without Windows uninstall can I buy a serial number or just need a new installation necessary? Thank you

Depending on the serial used you may need to reformat and start fresh.Vote if answered or helpful, I am running for Office (joke)! IT/Developer, Windows/Linux/Mainframe RaidMax Smilodon, 680W, Asus M2NBP-VM CSM AMD X2 4200+, 2GB DDR2-800, x600, more details on my site, need a video card for the Windows machine, the 8600 GT fried

You haven't yet said what trail version you're using. Regardless though, you WILL need to backup your data and install your purchased software cleanly. Referencing this document http://technet.microsoft.com/en-us/evalcenter/cc442495.aspx it says Here’s what you need to know: This is trial software designed for IT Professionals interested in experiencing the Windows 7 Enterprise on behalf of their organization so please read the following to get an idea of the risks and key things you need to know before you install. We do not recommend that you install this if you are a not an IT Professional or not professionally managing corporate networks. Guidelines on usage: Protect your PC and data. Be sure to back up your data and please don’t test Windows 7 on your primary home or business PC. You have 10 days to activate the product. If not activated within 10 days, the system will shut down once every hour until activated. Unsure on how to activate? Visit our FAQ. The 90-day Trial is the full working version of the Windows 7 Enterprise, the version most of you will be working with in your corporate environment. It will not require a product key (it is embedded with the download). The 90-day Trial will shut down once every hour when you have reached the end of the 90-day evaluation period. The 90-day Trial is offered for a limited time and in limited quantity. The download will be available through March 31, 2010, while supplies last. After the 90-day Trial expires, if you wish to continue to use Windows 7 Enterprise, please note that you will be required to purchase and perform a clean installation of Windows 7, including drivers and applications. Please keep this in mind; Windows 7 Enterprise is not available through retail channels.I highlighted that last sentence, read the whole document at the link I provided. If you're talking about the Windows 7 RC then read this link http://social.technet.microsoft.com/Forums/en-US/w7itproinstall/thread/f95879b0-5e9c-4f7a-82bb-9d1a41cefd4a MCSE, MCSA, MCDST [If this post helps to resolve your issue, please click the "Mark as Answer" or "Helpful" button at the top of this message. By marking a post as Answered, or Helpful you help others find the answer faster.]