According to Microsoft, Windows 11 customers can experience network speed issues with Dell’s SmartByte software running on their devices.
SmartByte is a Windows application that was developed to automatically stabilize the performance and quality of video streaming, downloads and Internet browsing by prioritizing network packets.
The app has been the cause of a long series of user reports mentioning network speed issues since Dell decided to preinstall and enable it by default on some of its laptop models.
Slow loading websites and streaming problems
Microsoft has now also identified compatibility issues between the SmartByte network software and Windows 11, version 21H2, which could result in slower than expected internet speeds on affected devices.
“Devices with the affected software can discard User Datagram Protocol (UDP) packets under certain conditions. This creates performance and other problems for protocols based on UDP, ”explains Microsoft.
“For example, some websites may load more slowly than others on affected devices and video may be streamed more slowly in certain resolutions.”
Some VPN software that uses UDP connections is also likely to be affected on systems running SmartByte.
Microsoft is currently working on a solution to this new known Windows 11 issue with an update that will be released as part of this month’s Patch Tuesday.
Windows 11 also not compatible with VirtualBox and Intel Killer
Redmond also confirmed compatibility issues with Oracle Virtualbox, Intel’s gaming killer network software, and the Cốc Cốc browser.
Due to compatibility issues with the Oracle VirtualBox virtualization software, customers may not be able to start their virtual machines (VMs) and, according to Microsoft, may receive an error message in the latest Windows 11 version.
Microsoft has applied a compatibility lock to protect the user experience by automatically preventing affected devices from offering or installing Windows 11, and is working on a solution to these known Windows 11 issues with an update that comes with the October Patch Tuesday will be released.
For all of these issues, we do not recommend performing a manual upgrade using the Update now or use the Media Creation Tool until a fix is available.
Microsoft released Windows 11 worldwide on Monday and is running it via Windows Update on new Windows 10 devices and those with Windows 11 preinstalled.
Windows 10 users can update to Windows 11 through Windows Update, provided they come with compatible hardware. The devices must also be running Windows 10 2004 and higher and have at least the September 2021 updates installed.