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September Windows and Excel updates break Remote Desktop, USB audio, and silent paste in spreadsheets
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Applying the latest Microsoft patches can cause Remote Desktop sessions to fail, USB audio devices to lose sound, and Excel paste operations to fail silently.
These disruptions halt remote work, multimedia playback, and basic data entry tasks for administrators and end users. Because the fixes are tied to security updates, rolling them back to restore functionality also removes the vulnerability patches, leaving systems exposed.
Written by elseif from the cluster below · every claim links back to a sourceThe three things worth knowing
Remote Desktop Services may fail or hang after the update on Windows 11 26H1 and Windows Server 2012.
Some USB Audio Class 1.0 devices lose audio on Windows 11 26H1, 25H2, and 24H2, with no sound or broken controls.
Excel paste operation can fail silently in versions 2016, 2019, 2021, and 2024 after the security update.
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Microsoft confirmed that its latest security updates disrupt Remote Desktop Services, silence certain USB audio devices, and break the paste function in Excel. Reports of RDS problems appeared on social media shortly after the update, and the company acknowledged failures across Windows 11 26H1 and Windows Server 2012. Users experience connections that drop after a few minutes, servers hanging at the 'Please wait for the Remote Desktop Configuration' screen, and related tools becoming unresponsive.
Adopting the update forces administrators to weigh broken remote access against missing security patches, because uninstalling the update restores functionality but also removes the fixes. Microsoft has not published a workaround, and some users have tried uninstalling and reinstalling Office or removing the update via command line to regain paste and audio. These actions return the system to a pre-patch state, eliminating the security improvements that the update was meant to deliver.
The issues affect specific builds: Windows 11 26H1, 25H2, and 24H2 for USB Audio Class 1.0 devices, and Windows 11 26H1 together with Windows Server 2012 for Remote Desktop. Excel versions 2016, 2019, 2021, and 2024 exhibit silent paste failures where the source stays selected and the destination unchanged. Temporary relief can be found by stopping and restarting a virtual machine for RDP or switching audio to two-channel mode, but Microsoft says it is still working on permanent fixes.
Written by elseif from the cluster below · checked for specifics the sources never containedTHE CLUSTER