ClickOnce Application Re-Downloading Due to Cache Limit Exceeded

By default, Windows limits the number of ClickOnce applications cached in a user’s profile to 10. When this limit is exceeded, the oldest applications are automatically removed to make room for newer ones. This results in applications being re-downloaded upon subsequent launches if they were previously purged from the cache.

To modify this behavior and increase the ClickOnce application cache size, navigate to the following registry key HKCU\Software\Classes\Software\Microsoft\Windows\CurrentVersion\Deployment and increase the OnlineAppQuotaInKB value.

For example, to increase the cache to 400MB, set the OnlineAppQuotaInKB value to 409600 (decimal).

  • The default cache size is approximately 250MB.

Modifying registry settings incorrectly can cause system instability. Exercise caution and back up your registry before making changes.