如果您丢失了 Windows许可证密钥，您可以从安装它的(license key)计算机或设备(computer or device)中恢复它。您可以使用可以搜索和显示Windows 产品(Windows product)密钥的应用程序来做到这一点。问题是互联网上有很多这种类型的应用程序，并不是所有的都是好的。这就是为什么我们决定测试其中一些并确定那些完全免费且最适合所有现代版本的 Windows 的原因：Windows 10、Windows 7 和Windows 8.1。您永远不知道何时需要恢复丢失的许可证密钥(license key)，所以让我们开始我们的应用比较：
1.使用Belarc Advisor找到您的(Belarc Advisor)Windows 产品(Windows product)密钥
Belarc Advisor是一个免费程序，您可以下载并安装在您的 PC 上。它不仅显示您的Windows 许可证(Windows license)密钥，而且还构建了您的软件和硬件(software and hardware)、网络清单(network inventory)、缺少的Microsoft修补程序、防病毒状态(antivirus status)和安全基准的详细配置文件。在分析您的计算机或设备(computer or device)后，它会在本地网页(web page)中向您显示结果。仔细查看(Look)浏览器窗口(browser window)的左侧，您应该会找到一个名为Software Licenses的链接：单击或点击(click or tap)它。它将带您到软件许可证(Software Licenses) 页面部分(page section)，它向您显示它识别的软件许可证，包括用于您的Windows 安装(Windows installation)的许可证。
2.使用Magical Jelly Bean Keyfinder找到您的(Magical Jelly Bean Keyfinder)Windows 产品(Windows product)密钥
Magical Jelly Bean Keyfinder有一个奇特的名字，但它是一个免费程序，而且运行良好。Magical Jelly Bean Keyfinder具有简单的用户界面(user interface)，只需几秒钟即可显示您的 Windows 产品。
3.使用ProduKey找到您的(ProduKey)Windows 产品(Windows product)密钥
ProduKey是一个小型实用程序，您可以将其用作便携式应用程序，或者，如果您愿意，也可以安装它。如果您选择使用便携式版本，您可以将其作为ZIP 存档(ZIP archive)。提取它并运行ProduKey.exe。程序启动并显示您的Windows 产品(Windows product)密钥。这个应用程序小，免费，快速且易于使用，所以我们推荐它！
4.使用SterJo Key Finder查找您的(SterJo Key Finder)Windows 产品密钥(Windows product)
SterJo Key Finder是另一个可作为便携式应用程序或常规安装程序使用的小程序。如果您选择便携式变体，您将获得一个必须解压缩的小型zip 存档。(zip archive)然后，运行KeyFinder.exe可执行文件。
SterJo Key Finder会立即启动并显示您的Windows 产品(Windows product)密钥。我们喜欢这个应用程序，因为它便携、免费且快速。
5.使用ShowKeyPlus查找您的(ShowKeyPlus)Windows 产品(Windows product)密钥
ShowKeyPlus是一个简单的便携式应用程序。您将其下载为zip 文件(zip file)，解压缩并运行ShowKeyPlus.exe。该应用程序立即显示Windows 产品(Windows product)密钥，并且没有广告。值得注意的是，ShowKeyPlus还可以找到存储在(ShowKeyPlus)Windows备份中的产品密钥。
6.通过免费PC 审核找到您的(PC Audit)Windows 产品(Windows product)密钥
Free PC Audit是一款免费的便携式工具，您可以下载并运行。它旨在提取有关您 PC 的硬件组件以及安装的软件应用(software apps)程序及其产品密钥(product key)的详细信息。此信息包括您的Windows 安装的(Windows installation)产品密钥(product key)。它很小且没有广告，但速度很慢，因为它会分析软件许可证以外的其他内容。如果您不仅要搜索Windows 许可证(Windows license)密钥，还要搜索有关您计算机的其他详细信息，这是一款不错的应用程序，我们建议您使用它。
7.使用Winkeyfinder查找您的(Winkeyfinder)Windows 产品(Windows product)密钥
就像它的名字所指出的，Winkeyfinder是一个可以找到你的Windows 计算机(Windows computer)使用的序列号的应用程序。这是一个便携式应用程序，这意味着您不必安装它。
打开它，您应该会立即看到您的Windows PC的(Windows PC)产品密钥(product key)。Winkeyfinder小巧、免费且易于使用。
8.使用Windows 产品密钥查看器查找您的(Windows Product Key Viewer)Windows 产品密钥(Windows product)
您可以将Windows 产品密钥查看器(Windows Product Key Viewer)作为便携式ZIP 文件获取(ZIP file)，无需安装。当您打开它时，它需要一两秒钟才能读取Windows 产品(Windows product)密钥。然后，它将它与有关您的计算机的其他一些信息一起列出。我们喜欢它，因为它是免费的，而且使用简单。
哪些Windows 产品(Windows product)密钥查找器是最好的？
我们在本综述(roundup work)中分享的所有应用程序都可以很好地找到您的 Windows产品密钥(product key)。但是，其中一些比其他更快，其中一些还可以显示有关您的Windows 设备(Windows device)的其他类型的详细信息。下面的比较可能会帮助您更好地决定使用哪些应用程序：
其中一些应用程序甚至可能会找到您计算机上安装的其他程序的产品密钥，包括(product keys)Microsoft Office。但是，如果您只需要一种快速查找 Windows 许可证密钥的方法，那么这些应用程序中的任何一个都可以使用。
如果您知道其他快速找到丢失的Windows 产品(Windows product)密钥的方法，请随时在下面的评论部分与我们分享。
Find your Windows product key. 8 apps that help you recover it!
If you lost your Windows liсense key, you could recover it from the compυter or device on which it is installed. You can do that with an аpp that can search for and diѕplay the Windows product key. The problem is that thеre are many apps of this type on the internet and not all of them arе good. That's whу we decided to test a few of them and identify those that are completely free and which work best with all modern versions of Windоws: Windows 10, Windows 7 and Windows 8.1. You never know when you need to recover your lost license key, so let's get started with our app comparison:
1. Find your Windows product key with Belarc Advisor
Belarc Advisor is a free program that you download and install on your PC. It doesn't just show your Windows license key, but it also builds a detailed profile of your software and hardware, network inventory, missing Microsoft hotfixes, antivirus status, and security benchmarks. After it analyzes your computer or device, it shows you the results in a local web page. Look carefully on the left side of the browser window, and you should find a link called Software Licenses: click or tap on it. It takes you to the Software Licenses page section, where it shows you the software licenses it identified, including the one for your Windows installation.
2. Find your Windows product key with Magical Jelly Bean Keyfinder
Magical Jelly Bean Keyfinder has a peculiar name but it is a free program, and it works well. Magical Jelly Bean Keyfinder has a simple user interface, and it displays your Windows product in just a couple of seconds.
3. Find your Windows product key with ProduKey
ProduKey is a small utility that you can use as a portable app or, if you prefer, you can install it. If you choose to use the portable version, you can get it as a ZIP archive. Extract it and run ProduKey.exe. The program launches and displays your Windows product key. This app is small, free, fast and easy to use, so we recommend it!
4. Find your Windows product key with SterJo Key Finder
SterJo Key Finder is another small program that's available both as a portable app or as a regular installer. If you choose the portable variant, you get a small zip archive which you must extract. Then, run the KeyFinder.exe executable.
SterJo Key Finder launches and displays your Windows product key in an instant. We like this app because it is portable, free and fast.
5. Find your Windows product key with ShowKeyPlus
ShowKeyPlus is a straightforward portable application. You download it as a zip file, extract it and run the ShowKeyPlus.exe. The app immediately displays the Windows product key, and it is ad-free. It is worth noting that ShowKeyPlus can also find product keys stored inside Windows backups.
6. Find your Windows product key with Free PC Audit
Free PC Audit is a free portable tool that you download and run. It is designed to extract details about the hardware components of your PC as well as the software apps installed and their product keys. This information includes the product key of your Windows installation. It is small and ad-free, but it is slow because it analyzes other things besides software licenses. If you are not searching just for your Windows license key, but also other details about your computer, this is a good app, and we recommend using it.
7. Find your Windows product key with Winkeyfinder
Just like its name points out, Winkeyfinder is an app that can find the serial key used by your Windows computer. It's a portable app which means that you do not have to install it.
Open it, and you should immediately see the product key of your Windows PC. Winkeyfinder is small, free and simple to use.
8. Find your Windows product key with Windows Product Key Viewer
You can get Windows Product Key Viewer as a portable ZIP file, no installation needed. When you open it, it takes a second or two for it to read the Windows product key. Then, it lists it together with some other information about your computer. We like it because it's free, as well as simple to use.
Which Windows product key finders are the best?
All the apps we shared in this roundup work well at finding your Windows product key. However, some of them are faster than others, and some of them can also display other kinds of details about your Windows device. The comparison below might help you make a better decision about which of these apps to use:
Some of these apps may even find the product keys of other programs installed on your computer, including Microsoft Office. However, if all you need is a fast method for finding out your Windows license key, any of these apps works.
If you know other ways of quickly finding a lost Windows product key, do not hesitate to share them with us in the comments section below.
