In the next window, you can edit Permissions for the current user, who is also the system owner now. This is the easiest method to activate your OS without using a Windows 7 key. The choice is yours! Product keys are one of the ways software developers protect their products against piracy. Unfortunately, they're easy to lose, which can be a real problem if you need to reinstall Windows or any other software from scratch.
If you've bought a desktop PC or laptop with Windows 10 already installed, you'll probably find its product key on a Certificate of Authenticity sticker on the the case or in the included paperwork, but not if you've built your own PC and installed the operating system yourself.
Many other applications also require product keys if you reinstall them — including Microsoft Office — and if you've lost the email you received when you first installed them, you could be in real trouble later on. Product key finders only work for software that's already installed, so download one and make a note of all your keys now, so you're prepared in advance. Belarc Advisor is primarily a tool for gathering information about your Windows system, including hardware, security updates and product keys.
Whenever you run Belarc Advisor, it automatically checks its database for software definitions — essential for finding keys for new programs. After that, it scans your system and presents the findings in an HTML page in your default web browser. Scroll down to 'Software licenses' to find serial numbers and product keys for Windows, Office and many other applications. Belarc Advisor offers a wealth of other information, including details of your antivirus software, connected hardware, and other devices on the same network.
Belarc Advisor's scans are fast and offer so much more information than just serial numbers, it's our favorite free product key finder. There are two versions of Abelssoft MyKeyFinder: free and paid-for. LicenseCrawler will find the license key for pretty much any application that has one, and it's free for home use. Its scan of the Windows registry takes a long time to complete — even if you select the 'high speed' option — but you can limit its scope using the blacklist and whitelist filters.
LicenseCrawler is distributed as a portable app, meaning you don't have to install it on the Windows system you're scanning — just download the zip file, extract its contents and run LicenseCrawler. This is particularly handy if you have several PCs; just download it to a USB stick and you can just plug it in and run it on any of them. The only downside of LicenseCrawler is the occasional pop-up ad, but finding product keys isn't a task you'll be performing every day, so they're only a minor inconvenience.
Windows Product Key Viewer is super fast, taking barely a second to scan your system and present the results. That's because, as the name suggests, it only supplies the product key for your operating system.
That shouldn't necessarily put you off though. Although it doesn't find serial numbers for other applications, it does provide some extra information about your OS, including the registered user, install date and last boot time, and it's compatible with versions of the operating system from Windows 10 all the way back to Windows Take care when downloading the software — the site includes some ads that look like download buttons for the software, but are in fact unrelated.
Again, follow all the commands given below one by one and then press enter after each command. Step 9: Next, you need to restore the boot sector by typing the following command:. Eligibility for downgrade rights. Please note if you bought a computer with Windows 7 Professional or Ultimate editions, you are eligible for downgrade rights to any of the following editions and versions of Windows: Windows Vista Ultimate or Business, Windows XP Professional.
Please note, the downgrade rights are on a case by case depending on the OEM. So, even though you are eligible, the option might not be available and it might specific to the model computer you purchased from the manufacturer.
If this is the case, then you will need to provide your own full version license. Volume License customers have all rights to downgrade to any edition or version of Windows they wish, so if you are using a Company PC purchased with Windows 7, contact your Administrator about downgrade options available to you.
Answered by:. Archived Forums. Windows 7 Installation, Setup, and Deployment. Sign in to vote. Do we need product key of windows XP for downgrading windows 7 professional to windows xp oem version? Thursday, March 20, AM. OEM keys are preinstalled by the manufacturer, you can reinstall Windows on the same machine over and over again.
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