If you receive error “CPT_NOT_AVAILABLE”, it means that Windows product key is not applicable for this product. There are several reasons why product keys may get rejected. The first and the most important reason is missing or misplaced product key. In order to apply a product key successfully, you must know the product key. You can find it on Windows CD-ROM.

The next reason is that Windows might have been installed with wrong product key, or there could be other problem. To fix this problem, run box around Windows and see whether all of its programs are properly started. Then run the product key generator. Follow the instructions carefully. If you do not know what this step is, here it is.

For users who have slow Internet connection, there is possibility that they will encounter ‘ftp deadlock’. The deadlock is caused due to missing dependency library. To fix this problem, try to open Front Page and browse to ‘Add’ link. Now you can type the command prompt and add the missing dependency library. If this does not work, you can also try to run the’registry cleaner’ software.

If Windows has been installed correctly, you should not encounter any error. However, if you still get error “CPT_NOT_AVAILABLE” when you try to run a program, then it is necessary to use the “regedit” command prompt to edit the following registry keys. This step is very important because this will enable you to fix any problem that has developed in the system. After you complete editing the registry, you should not receive any error message while starting Windows. In other words, everything has been successfully done.

If the above simple steps do not work, then the next step is to run registry editor and try to fix the following errors: HKEY_CURRENT_USER\Software\Microsoft. Press Enter key to run the editor. You should get list of folders and files under the HKEY_CURRENT_USER folder. It means that when you are trying to fix the error, you must find out the specific folder and file. In order to fix the problem, you should delete all the files in the following folders and file:

Product Key – This is the product key that was produced after purchasing software from Microsoft. If this product key is missing or lost, you cannot use the software anymore. This means that the trial use period is already expired. And you need to buy new copy of the product to use.

Restore Point – When you try to open the application, you may encounter the following message “License Expires Soon”. The group policy that is set at installation is also responsible for activating the application. If the group policy is disabled or uninstalled, this will also break the process of activation. To fix the problem, you should either reinstall the group policy or restore the one that was set at installation.

What happens if the activation troubleshooter shows error “Products have expired”? If you can not see any error in the “Activation Tools” window or the “Add/Remove Programs” application, it is because products have already expired when they are first installed. You can easily see this message if you perform a system scan with the help of a Windows license checker. After detecting all expired items, you should remove them from your computer and reinstall the ones that are left. This is the step 3 in the series to fix Windows licensing problem.

Product Keys – If the above-mentioned method fails, you may have purchased a key for the product that has already been expired. If you have purchased a product key, there should be no entries in the registry. Also, if you try to activate the product, you may see a question mark appearing on the screen. If this question mark appears, you probably bought a expired product key.

How to fix expired product keys? This can easily be done by using the Remove program component on your computer. You have to find the programs or applications that you have previously installed and then remove it. This will enable you to uninstall the software, thus making it impossible for it to register on your system again.

Reinstall the product keys that are missing from your system and then reinstall them. This will solve the problem. What happens if Windows license expires?

Invalid Product Keys – If the above-mentioned methods do not work, you may have got an invalid product key. This means that Windows has no use for the product keys that were stored in the registry. This problem cannot be solved by using the Remove or Add program components. To fix this problem, you need to use Windows Repair Pro. This tool can fix all the errors in the registry. What happens if Windows license expires?

Product Key Errors – If your computer keeps showing wrong information on screen or if it keeps crashing, you may have got a product key error. This means that Windows has no use for the product keys that were previously stored in the registry. This problem cannot be fixed by using the Remove or Add program components. To fix this problem, you need to use Windows Repair Pro. This tool can fix all the errors in the registry. What happens when Windows license expires?