How to Troubleshoot AOL Email Error 521?

AOL mail is a free web-based email service provider by the popular division of Verizon Communications, AOL. Another name for this widely used email service provider is AIM Mail (AOL Instant Messenger). With AOL email, you can enjoy unlimited email storage capacity, up to 25MB email attachment limit, POP3, SMTP & IMAP supported protocols, link other email service providers such as Hotmail & Gmail, spam protection, virus protection, spell checking, indicators to display online buddies and other exciting features.

While using AOL, you may encounter few errors in it. One of the most common errors is error 521. This error occurs due to the following reasons:

1. When a recent AOL Instant Messenger related software change leads to corruption in Windows registry
2. When you download any corrupted application
3. When you stopped the installation in-between of AIM
4. When a virus or malware harms Windows System Files or AIM related files
5. When a program mistakenly or unintentionally deletes AIM related files

If you are also experiencing this error and looking out for a reliable solution for the same, then the below mentioned information would definitely be helpful for you. Have a look:

1. Fix the registry entries related with error 521
2. Initiate a complete virus scan of your PC
3. Remove all the junk files and temporary files using disc cleanup
4. Make sure your PC drivers are updated to the latest version available
5. Use Windows System Restore to “Undo” recent system settings
6. Uninstall and then reinstall the AIM program associated with error 521
7. Run Windows System File Checker
8. Make sure you have updated your Windows to the latest version
9. Perform a clean installation of Windows

After trying all the aforementioned steps, if you are still facing an error, then call AOL customer support. The technician team at their customer service centre works 24*7 to provide you the best solution of all the AOL email and web browser related errors. Hope the information was useful!

Source: http://help-number.com/blog/how-to-troubleshoot-aol-email-error-521/