Having a Windows Error Code 0x80240016 pop up does happen. Fortunately it is a known issue and there are some easy tips to helping you solve the problem. Read our article on Windows Error Code 0x80240016 and take care of it today.
If using Windows Defender, you may get a message telling you to check for new definitions, or stating that the definition updates cannot be checked, downloaded, or installed.
Taking care of the Error downloading definition ... message
To fix this problem, check for updates in Windows Defender. Launch Windows Defender, and click “Check for updates now.” If this is not possible, then restart the computer and manually install the update definitions by visiting the Microsoft security portal at: http://www.microsoft.com/security/portal/Definitions/ADL.aspx.
TipFor more information, please see: How to fix Defender error #0x80240016