How many times will microsoft let you activate windows?
454445
I don't think there is a limit.  I've got a computer at work I've had to reimage and reactivate dozens of times and haven't had a problem.
955547
If you only purchased one license, it is illegal to use it on more than one PC.  If you wish to be legal, you will have to purchase a second license.
515063
Use the telephone option. There is a toll free number. You will have to read the guy your 'key'# and answer a couple of questions...\n1. Click the Windows Activation icon in the notification area. \n2. Click Yes, I want to telephone a customer service representative to activate Windows now. \n3. Open and read the Windows Product Activation Privacy Statement, click Back, and then click Next.  \n4. Follow the steps in the Activate Windows by phone dialog box....
1001573
This can happen if you make a change in your system configuration that is enough to trigger the XP activation required. Someone may have answered no, and then after 30 days, you can not proceed unless you activate.
756580
If you dont have a legel copy you should really get one. \n\nBut to give u the benefit of the doubt here is a direct link http://download.microsoft.com/download/1/6/5/165b076b-aaa9-443d-84f0-73cf11fdcdf8/WindowsXP-KB835935-SP2-ENU.exe
261905
It will always ask you for a key every time you try to install it. If you have the original software, the cd sleeve should have the serial. Microsoft does offer some phone activation options as well.
383120
u may have original code but it wont help u windows continually scans computers for pirated code and for legit codes. if it sees 2 identical codes it will disable the latter of the 2 codes to b activated. in fact it may not allow the 2nd person using the same code at all\n\neven if u did get it to work window update would require a validation tool to b downloaded b4 the sp2 so ur copy would fail verification and update wouldnt help u in short get real copy
260415
It does not expire but Microsoft stops supporting programs over 5 years old. This includes operating systems.
920720
You can "activate" Word 2003 on up to 2 computers without any hassle. After that you have to contact MS and say "I upgraded to a new computer and need to activate blah blah" and they will let you. They give you a phone number to call when the activation fails.
1013006
It probably came up with this message because when it installs, it has a list (I'm assuming) of blacklisted numbers. What this means is that somehow your Windows product key got out into the open, and Microsoft has discovered it and deactivated it. What I suggest you do is go to the following website: http://www.microsoft.com/resources/howtotell/ww/windows/default.mspx. In this web page, it will validate your copy of Windows. If you bought the copy of Windows from some shady retailer or from some other shady place, or if you downloaded it illegaly, you can write to Microsoft and tell them your situation. If they are nice enough and your story is real, and they find out about it you are eligble for a fresh copy of Windows.
967623
Where it is not impossible to "reset" the timer it is illegal, you were given a Beta copy of Vista for testing purposes and the testing period is over.  If you are listed as a Microsoft Tester or was given the Beta version from a Microsoft certified "agent" you may be able to request an extension, otherwise the testing period is over and you'll need to either get the latest version, wait for the retail version and purchase it, or keep trying to get an illegal version of the OS.\n\nI have been able to extend the trial period for upto 6 months by doing a complete (and I do mean complete, including erasing all traces from the registry, temp, and system folders) and doing a re-install on a different partition of an existing hard drive that has the date/time settings tweeked to not advance.  However, after you use the operating for more than a day, or as soon as you go online with it, it starts the timer no matter what you do, and after 6 months it doesn't work anymore.  \nSo unless you have a bunch of hard drives sitting around with nothing on them and are willing to do a complete unistall/format/re-install every 3 or 4 months, just wait.
360258
What operating system?  Do you need multiple sessions, or only  one at a time?
1025193
No.  He will require a copy for each computer he installs it on.  However, if you are a student they will often sell unlimited site license versions that you CAN install on all of your computers.\n\nBut as far as retail versions, no, you need a different copy for each computer.\n\nI have tried on several occasions to get new license keys from Microsoft, unsuccessfully, it was just easier for me to run down and buy a new copy (and with it a new license key).
576080
You just need validate windows when downloading/installing software no critical considered no essencial! But really the player might be included. Suppose player 9,10 you dont need to! But when you have some dificult question not satisfatory answered here you can always go to a microsoft forun  Hope be usefull.
887626
then u have to reinstall windows again
32449
Yes:\nhttp://www.funponsel.com/blog/archives/2005/08/06/how-to-bypass-windows-genuine-advantage-check-on-windows-xp/
630066
This is true unless the software came included with your PC when you bought it.  In this case, you'd likely have an OEM license, which can only be activated in one PC.