On a fresh Exhange 2013 install you cannot log into the ECPEAC and receive the error Server Error in owa Application. The Active Directory user wasnt found. How to Downgrade Preinstalled or Upgraded Windows 1. Installation to Windows 78. Share. Share. Share. Email. Microsoft hopes to have Windows 1. Cannot Login To Windows 8 After Installation' title='Cannot Login To Windows 8 After Installation' />An admirable goal, but one that does not take into account the requirements of the user. Windows 1. 0 shares a lot in common with Windows 8. For Windows 7 users, the story might be a little different. Some older applications just work better with the older versions. Windows 8. 1 is more than a Service Pack. The significant Windows 8. We show you how to. If you purchase a new PC today, it likely will have Windows 1. Users still have an option, though, which is the ability to downgrade the installation to an older version of Windows, such as Windows 7 or even Windows 8. Important Note This is a different process than rolling your Windows 1. When you upgrade Windows 7 or 8. Windows 1. 0, you have a 3. For more on rolling back, check out one of these following articles Prerequisite Tasks you should Complete. Downgrading is an involved process I strongly recommend you have everything in place before you start this project, such as The copy of Windows 7 or Windows 8. If you dont have a license, you will have purchase a Windows 7 or Windows 8. If your system came preinstalled with Windows 1. Pro, youd need to download or borrow a Windows 7 Professional or Windows 8. Pro disc. A product key from a computer that is running Windows 7 Professional or Windows 8. Pro. If you are exercising downgrade rights from Windows 1. Pro OEM, this key can be either a retail upgrade, full version, OEM preinstalled, or System Builder product key. Necessary hardware drivers for either Windows 7 or Windows 8. External hard disk to back up your Windows 1. Have a copy of your Windows 1. Pro OEM product key available, just in case Microsoft support needs to verify it during activation. Here is how you can find it. Please note, this is for OEM preinstalled Windows 1. Pro licenses only. Press Windows key X then click Command Prompt Admin, at the command prompt, type the following command, then hit Enter on your keyboard. Software. Licensing. Service get OA3x. Original. Product. Key. Other Options you should Consider Before Downgrading. For computers upgraded to Windows 1. Windows 8. 1 or Windows 7, a limited option is available within 3. If your upgrade to Windows 1. If your computer came with recovery media, consult the documentation for instructions on how to reinstall Windows 7 or Windows 8 on your computer. If you recently purchased a new computer, preinstalled with Windows 1. The hassle associated with actually downgrading is not as convenient and smooth sailing as you might believe. Also, there remains a demand for systems with older versions of Windows, which is what you might prefer. Most OEM vendors such as DELL, HP, and Lenovo offer new model systems with a choice of Windows 7 or Windows 8. If your computer is still within its warranty period, then I suggest you take advantage of it and purchase an appropriate system preinstalled with Windows 7 or Windows 8. Microsoft made available, a list of vendors who are providing a selection of Windows 78. Intels latest CPU architecture, Skylake. Microsoft recently announced plans to limit Windows 7 and Windows 8. Skylake. This would make now an opportune time to upgrade to a new PC while they are available. Training Microsoft Excel 2007 Ppt. Within a years time, Microsoft will only focus on supporting Windows 1. Downgrade to Windows 8. Windows 7. If you recently bought a system with Windows 1. Here is what you need to do, to determine if you can successfully downgrade Check if the manufacturer has native Windows 7 and Windows 8. You will need important drivers such as Chipset, Video, Network, Audio, and Storage to have a working system. A Windows 7 or Windows 8. If you dont have a license for Windows 8. Windows 7, you will need to purchase one. If your system came preinstalled with Windows 1. Pro, then you are automatically entitled to downgrade rights to Windows 8. Pro or Windows 7 Professional. Go to the manufacturers website, and then look in the downloads and drivers section of the website. Enter the model number then click OK or Go. Once your drivers have been found, the website will usually have an option to filter the operating system. Click in the list box, select Windows 7 or Windows 8. Proceed to download all the critical drivers such as Chipset, Video, Network, Audio, and Storage. After downloading, save them to a thumb drive until you are ready to install them. Backup your Windows 1. System. You might not like Windows 1. Windows 7 might be temporary. In the future, if and when you decide to return to Windows 1. This will, of course, be like performing a clean install, with minimal inconvenience. Check out our article for instructions how to create a system image in Windows 1. Choose the right edition and architecture of Windows 7 or Windows 8. You need to determine, the version and architecture of Windows 7 or 8. If your computer has more than 4 GBs of RAM installed, use a 6. If your objective is compatibility with legacy hardware or software, then 3. If you are exercising downgrade rights from Windows 1. Pro OEM, you can download a copy of Windows 7 or Windows 8. For Windows 7 media, you will need to have a valid product key. If you dont, then the software recovery page will not work. Your next best option is to borrow a corresponding Windows 7 Professional disc from a trusted friend or family member. Disable Secure Boot and EFI Boot then Prepare to install Windows 7 or 8. Installing Windows 7 or Windows 8. Check out our articles for instructions on how to do so. The procedure involves performing a clean install. You cant perform an in place upgrade to an older version of Windows, from within Windows 1. Before starting the installation, you will need to disable Secure Boot and native EFI boot. This process is required if you are installing Windows 7. Also, disabling Secure Boot is necessary before enabling legacy boot. Secure Boot was first introduced as part of the Windows 8 wave of systems featuring a new security mechanism for protecting systems from malware. Disabling Secure Boot might vary across system brands and models the process will require booting into the systems firmware interface. Check out the following Tech. Net article for instructions how to disable Secure Boot. After booting from your Windows 7 or Windows 8. Click the option Custom Advanced, then select each partition, then click delete until there is only a single, unallocated disk. Click New this will create a system recovery partition. Choose the larger system partition then click Next to install your version of Windows. Install Hardware Drivers and Update Windows. After installing Windows 7 or Windows 8. Start off with the most critical which include Chipset, Video, and Network. Your Windows 8. 1 and Windows 7 installations will likely be out of date, so immediately check Windows Update for the latest updates then install them. Also, ensure your Antivirus utility is updated. Windows 8. 1 includes a built in Antivirus called Windows Defender. Windows 7 users can download Windows Defender or another free third party Antivirus utility. Activating your Windows 7 or Windows 8. License. Once you have Windows 7 or Windows 8. Depending on the options chosen or available, this process should be smooth. If you had to purchase a retail or OEM system builder license, then standard Internet activation will be all you need to do. For systems utilizing downgrade rights through Windows 1. Pro, your options are tricky. According to Microsoft, you should contact the OEM about obtaining a license.