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Hi, I have a generic computer,i.e. built up for me. It has no CoA on it for me to activate Windows. Can you help me, please ? Simon

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  • shenry385 Jun 27, 2009

    Thank you for that.

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  • 49 Answers

Most likely you will have to purchase a license key from Microsoft unless you want to go the pirate way and google "windows activation." You should get many results to help you achieve what you want.

Posted on Jun 27, 2009


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1 Answer

I need Product Key of my PC

Did you have Windows XP Professional on your laptop before you downloaded it from the internet? If not, that's your first problem.

When you reinstall or download a operating system you must use the one that is on the Certificate Of Authentication (COA) Sticker on the bottom of your laptop or inside the battery case. That's your key on it (the series of 5 letters and numbers).

If you use someone else's disk to install or download like you did you must make sure that it is the same operating system as yours. In other words, if your COA says Windows XP Home, then you can't install Windows XP Professional because when it comes time to activate it will fail.

Borrow a operating system disk that is the same as your COA from neighbor, friend, relative or co-worker and reinstall windows. When it asks for the key, use the key that is on your COA Sticker then it will activate.

If you have to take it to a computer repair shop they should install the operating system for $60 or less if you have a valid COA Sticker.

May 15, 2012 | Acer Computers & Internet

1 Answer

I lost my installation disc for my acer aspire 7736z-4905 and can i download one for free?

You don't need it, most times it don't work if you are talking about a Recovery Disc.

Look on the bottom of your laptop or inside the battery case for a Certificate of Authentication (COA) Sticker. It will tell you what version of windows you have and it will have a series of 5 letters and numbers (keycode for activation) on it.

Borrow that same version of the operating system disc that is on the COA from a neighbor, friend, relative or co-worker and reinstall windows. When it asks for the Activation Code use the one that is on you COA Sticker. The disk you use has to match your COA Sticker. For example if your COA says Windows 7 Home Premium, you can't use a Windows 7 Home Basic to do the install.

You can always take it to a computer shop to reinstall because as long as the COA is there they can do it and it should not cost more than $60.

May 13, 2012 | Computers & Internet

1 Answer

You may be victim of software counterfeiting

LOL, sounds like you've got a bogus copy of windows on your computer. Who put it there? Did you have some jackleg repairman do it? If you turn your laptop over you should see a windows certificate of authentication (COA) sticker affixed to the bottom with a series of 5 numbers and letters. This is the genuine copy of windows that was installed on your machine and anytime you reinstall your operating system or replace your hard drive, motherboard, it must be keyed in to reactivate windows. On Windows 7 the COA might be inside the battery case. You can try activating your copy by keying in the coa key, if it is not legitimate then it won't activate.

Mar 19, 2012 | Samsung N150 (36725723009) Netbook

3 Answers

Recommended product key

It is my pleasure to guide you.

After doing some research I found what may be what you need. This comes from


Wednesday, October 13, 2010 9:00 PM
Darin Smith MS, Microsoft Contingent Staff, Owner

Computers, which are built by large manufactures that come with Windows Pre-Installed, come with two (2) Product Keys:

A) OEM SLP: This key comes pre-installed in Windows, when it comes from the Factory. This key is geared to work with the OEM Bios Flag found only on that Manufacturer's computer hardware. So when Windows was installed using the OEM SLP key (at the factory) Windows looks at the motherboard and sees the proper OEM Bios Flag (for that Manufacturer and that version of Windows) and Self-Activates. (that's why you did not need to Activate your computer after you brought it home)

B) COA SLP: This is the Product key that you see on the sticker on the side (or bottom) of your computer. It is a valid product key, but should only be used in limited situations (such as if the OEM SLP key stops self-activating for whatever reason). The key must be activated by Phone. (Note: All manufacturers that use the OEM SLP system are required by contract to include a Certificate of Authenticity (COA) sticker, that has a COA SLP key, on the computer)

Your Windows is using an OEM SLP key, but (for whatever reason) cannot see the special instructions in the computer's motherboard and is unable to Self-Activate.

To fix the issue, you will need to change out the OEM SLP key with the COA SLP key. The normal way to do this is to click the 'Start' button, right-click 'Computer', select 'Properties' and then click 'Change Product Key' (located in the lower right-hand side of the window). Enter the COA SLP key and follow the instructions in the Change Product Key Wizard.
Alternate steps to change the product key
1) Click the Start button
2) Type: slui.exe 3 and hit the Enter key
3) Type in the Product key from the sticker on your computer
4) Click the Next button.
5) You will be asked if want to Activate, click ok
It will attempt to Activate by the internet and will return an Invalid Key error (this is ok, continue to step 66)
6) Click the Start button
7) Type: slui.exe 4 and hit the Enter key
8) Select your location in the drop down menu and click the Next button
9) The next screen provides the number to call to Activate by Phone
NOTE: when you call that number, you will first hear an Automated Voice. If the Automated Voice gives you an option to talk to a Live Activation Rep., select that option. If not, do not enter any numbers. This should force the Automated Voice to transfer you to a Live Activation Rep. Trying to Activate thru the Automated Voice will not work, in your case; only thru the Live Activation Rep. will your Activation be successful.


I learned something new while doing this research. I like doing new things that is why I do this.

Good luck and please post back that you are successful or that I can be more helpful.

Jun 09, 2011 | Computers & Internet

1 Answer

I need a key for my windows vista home basic. can anybody help me. mail to :

If your computer is a brand-name PC, then a sticker with your license number (known as a COA or Certificate Of Authenticity) should be attached somewhere on the computer.

If you don't have the COA attached to the computer, restoring the computer using the manufacturer's CD/DVD's will restore Windows to an activated state.

If the computer is running Vista Basic but you lost the key, then download Magic Jelly Bean Key Finder here:

Feb 14, 2010 | Computers & Internet

2 Answers

Windows Xp Product Key Issue

JellybeanFinder is a program that can display all windows and office keys.

But this may still be a problem is windows does not start. Try booting in Safe Mode, hitting F8 after turning on the computer.

Nov 17, 2009 | Microsoft Windows XP Home Edition

1 Answer

NO COA on Windows XP Pro CD never installed..?????

Google freeware program called Key Finder. May work, lost sticker on computer once and downloaded this and it gave me the key when I clicked on it . Of course you will have to download
Windows disk first and then load Key Finder. Would burn on CD before you load Windows. Worth a shot.

Apr 01, 2009 | Microsoft Windows XP Professional

1 Answer

How can I get the product key for VISIO 2007 which I downloaded from site

  1. Download Windows Product Key Update Tool (KeyUpdateTool.exe) from Microsoft.
  2. Select Run when prompted.
  3. Enter the product key found on your COA where requested, and then click Next to begin the update.
  4. Once the update is complete, click Finish to restart your computer. When your computer restarts, your computer’s product key will match the COA product key. If this tool fails to change your product key to match your COA, contact Microsoft Support.
  5. After updating your product key you will be required to activate Windows. Once Windows is activated, you can verify that your copy of Windows is genuine by going to and clicking Validate Window

Nate P.

Feb 03, 2009 | Microsoft Office Visio Professional 2007...

2 Answers

Need to activate windows xp. dont have a coa # on computer.

Did this come on a WinXP disc, or did Windows come preinstalled on the computer? If you lost the CD Key, you're going to have to call Microsoft tech support to get a key to activate it.

Dec 28, 2008 | Computers & Internet

1 Answer

Activation key

If you call Microsoft and give them an explanation and your COA they will issue you a code to input that will get you around it. They will ask how many machines your COA is installed on. Just say "one" and you'll be fine.

The screen should have a phone number to call. It varies by the location that you select. So, I can't look up the number for you. Good luck!!

Oct 01, 2008 | Microsoft Windows XP Professional for PC

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