I have my windows 7 starter on my lenovo s10-3 notebook whn i bought it, then my officemate changed it to Windows 7 ultimate, my problem now is everytime i open my laptop it says here that the copy of my windows is not genuine and i need to activate it, what i want now is to reinstall back my windows 7 starter because its the genuine one, i have my product key for win7 satrter but i dont have any cd or installer. please reply to my concern. thanks

You must completely reinstall Windows to go back to Starter. OEM computer manufacturers are required to provide at least one way for you to reinstall Windows if you buy a computer with Windows preinstalled - your computer should have included either a restore partition (check your manual) on your hard drive, or Windows install/restore disks. If you don't have either contact the OEM computer manufacturer and ask them to send you an install disk for your computer - they may or may not do it. If they agree to send you one they may charge a small fee. Before you reinstall, try phone activation for your current install. Call Microsoft Using Manual Phone Activation If you are currently installing Windows - at the Enter Your Product Key page, do not enter your key and uncheck "Automatically Activate When Online" then click OK/Next to finish the installation. If you have trouble activating Windows 7 open the Windows Activation Wizard while in Windows 7 to obtain a phone number to call Microsoft and activate Windows: 1. When you reach the desktop click Start, then in the Search box type: slui.exe 4 2. Press Enter on your Keyboard 3. Select your Country. 4. Select the Phone Activation option, then call the number given and hold for a real person. For more details: http://www.sevenforums.com/tutorials/18715-activate-windows-7-phone.html Have Questions About Installing Windows 7? FAQ - Common Windows 7 Installation Questions & Answers