As Microsoft explained, the update addresses many security vulnerabilities and app launch problems. However, it also brings four new bugs to the table including system functionality and installation issues.

KB4493509 reported issues

1. System not working correctly

One of the users reported that his system didn’t work as desired after installing KB4493509. However, the user managed to fix this issue by uninstalling the update. This issue seems to affect all the systems that have been updated to KB4493509. One of the quick workarounds is blocking the update by using the Show/Hide Updates tool.

2. Installation failure

Other users also reported that the installation failed to advance beyond 94%. Running the update troubleshooter did not fix the issue. If you are one of those users who are experiencing this issue, you can manually download the updates. 

3. Custom URI Schemes bug

Microsoft already acknowledged this bug. The tech giant states that the corresponding application for local intranet and trusted sites on IE might fail to start by Custom URI Schemes for Application Protocol handlers.  Microsoft suggested a temporary fix but its engineers are also working on a permanent fix. Enable Protected Mode in Internet Explorer for local intranet and trusted sites. You must restart the browser after making these changes.

4. WDS server connection termination issues

The is the second bug acknowledged by Microsoft. Users may experience issues while starting a device from a Windows Deployment Services (WDS) server configured to use Variable Window Extension. This device startup issue triggers by using the Preboot Execution Environment (PXE). RELATED ARTICLES YOU NEED TO CHECK OUT: Option 1: Open an Administrator Command prompt and type the following: Wdsutil /Set-TransportServer /EnableTftpVariableWindowExtension:No Option 2: Use the Windows Deployment Services UI.

Windows 7 KB4493472 and KB4493448 enhance ransomware protection KB4493474 fixes some nasty Windows 10 v1703 bugs

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