Find windows xp product key

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.

Free PC Audit is another portable application, and doesn't even come as a zip archive — just download the exe file and run it to begin scanning. Like Belarc Advisor, Free PC Advisor provides a wealth of information about your whole system — not just its software — though its interface isn't quite as intuitive. It also provides lists of all installed software and running system processes, though this information is readily available through Windows itself.

A large number of users fully trust on these windows activation codes as these keys work percent for win XP pro sp3. Apparently Nirsoft's ProduKey can do this:. Load product key information from another operating system on the same computer. I did it this way about 4 years ago , so I'm really hoping ProduKey works. If you are able to extract the 15 bytes from positions 0x34 and 0x52 in the DigitalProductId Registry Value as a Hex string, you can use the following Python Python 3 script to convert the bytes to a Product Key:.

You can see the details about where to find the DigitalProductId Value in another answer, but essentially, look in the Registry Key:. If you cannot access an interface to the machine, but can access the filesystem, find the Registry Hive at:. If I wanted to expand the script, I could add a Registry or. Sign up to join this community. The best answers are voted up and rise to the top. Stack Overflow for Teams — Collaborate and share knowledge with a private group. Create a free Team What is Teams?

Learn more. Asked 12 years, 4 months ago. First we need to get some information from the registry. This is the registry editor with all trees minimized. This tool will allow us to make many changes within all of our applications and the operating system.

You can severely damage your computer in here, so please be careful not to mess with anything unless told to do so. Highlight CurrentVersion. Office Office Exchange Server. Not an IT pro? Resources for IT Professionals. Sign in. United States English. Ask a question. Quick access.