The following guide will show you how to fix the PUR-AuthenticationFailure Error.
Workaround: Purchase from the Official Microsoft Website
If you are unable to purchase an application from the Microsoft Store, then as a workaround, you can purchase the application from the Official Microsoft Website. Follow the steps below to see how to purchase applications from the MS Website:
1. Run the Windows Store Troubleshooter
Troubleshooter is a built-in feature on Windows that allows you to detect the problem that may be causing an error. Therefore, you must run the Windows Store Troubleshooter and detect the issue that is causing the error to occur. The Windows Store Troubleshooter can be performed as follows:
2. Change your Current Region
One of the major reasons why you are facing the error is that the region of your Microsoft Account is different from the region on your system. This will create interference in your purchase. Therefore, you must change the region on your system to the region on your Microsoft Account before purchasing or installing any applications. Follow the steps below to see how to change your region in Windows:
3. Reset Microsoft Store Cache
A corrupted Microsoft store cache can also be one of the reasons that lead to the PUR-AuthenticationFailure Error. Therefore to prevent the cache from being corrupted, you must Reset the Store Cache. Follow the steps below to see how to Reset the Microsoft Store Cache:
4. Turn off Proxy Server
Proxy servers help in protecting your online privacy. However, they can also interfere with the Microsoft Store and thus leading to an error that prevents you from purchasing applications. Therefore, to prevent this from happening, you must turn off the Proxy Server from your Windows. You can see below how to turn off the proxy servers:
5. Update your Windows
Having an outdated Windows will also lead to this error as an older version of Windows doesn’t support the Microsoft Store Purchase. Therefore, you must update the current Windows to make your system applicable to purchasing the application from the Store. With the instructions given below, you can perform the Windows Update:
6. Disable the “Do not save encrypted pages to disk” Option
Another reason for the occurrence of this error is that the Advanced Internet Properties have an enabled “Do not save encrypted pages to disk” option. This option prevents you from installing applications and programs even from secure websites. Therefore, makes sure to disable this option before opening the Microsoft Store. Follow the steps below to learn how to disable this option:
7. Enable Microsoft Account Sign-in Assistant Service
A disabled Microsoft Account Sign-in Assistant Service can also be causing the error. However, this service is disabled on all computers by default. Therefore, you must manually enable it to help prevent the error from occurring. Follow the instructions listed below to enable the Microsoft Account Sign-in Assistant Service:
8. Enable Real-time Protection
Another reason for the occurrence of this error can be associated with viruses and malware. Therefore, you must enable your security software to protect you from harmful malware that is causing this error. To enable real-time protection and get rid of malware and viruses, follow the steps below: Note: Additionally, you can install third-party security Software such as Avast to scan the system and protect your system from harmful malware. However, this option is cost-worthy and requires you to buy the premium version. If you want to continue, follow the methods below to see how to use Avast Antivirus:
9. Sign in from a Different Account
If the error still persists, then as a last resort, you must Sign-in from a different account to resolve this error. Using a different account you can purchase your applications from the Microsoft Store. You can Sign in from a different account with the steps listed below: Note: if you do not have another account, you have to Create a New Microsft Account and then sign into it.
