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Pirated
maybe the windows xp operating system is not genuine
First of all, that's what happens when you buy PC.
Buy a licenced copy of Windows and install it.
If you are installing it from Microsoft website then the answer is Yes. Microsoft will ask you to pass validation. If you have a stand alone copy of it, then you have to disconnect your PC from Internet and istall it, in such cases it's better to have firewall (windows firewall doesn't work in such cases).
You can't Microsoft has so many ways to check that if one thing seems wrong with it you won't be able to post questions here anymore because part of your parole is that you can never touch a computer again.
Try to pass OS validation test on the Microsoft website.
You will most likely need to purchase a legit version of windows XP and activate it over the internet or by phone when prompted after login. If you already have a version of windows XP and it matched the installed version, you will be able to call Microsoft (the number is given before activation) and tell them you need to activate it. If all else fails, extract your hard drive and pull the data off (that you need) onto another computer, then wipe the hard drive and reinstall windows.
The short answer is - no. Windows 7 software is protected by copyright. If you make a copy (even of the disk that came with your own computer) you're breaking the law. Each copy of Windows 7 software is licenced for ONE machine only. The first time you use Windows 7 - it registers with their server, activating the licence key for that copy. If you subsequently install it on a second machine - the Windows server instantly knows the licence key for that copy has ALREADY been activated.
The validation code on the E-ZPass can be found on the back of the pass near the mounting strips. This code will contain letters and numbers and is case sensitive.
knock-off fake
No. There is no rule about "everyone" getting a copy. Once it has been filed in probate it becomes a public document and anyone can get a copy.
Air locking windows are types of windows that do not allow air to pass through them. These are the types of windows that are normally used in aircrafts.