@Chaniru Rajapakse
Hi,
Some users have reported the same problem as yours.
Commonly Windows 10 update stuck at 61% due to incompatibility of Conexant audio driver. Other probable causes can be software conflict, corrupted update components, or faulty and missing system elements.
If you have a Conexant audio device listed in device manager to just uninstall it and make sure you click on remove driver files.
Check your pc if you have installed it, uninstall it mostly installed with the headphone software
If you use headphones then uninstall its driver software and then restart and open update and wait it will install everything, make sure you have not connected any other device except wired mouse, keyboard and monitor.
Also, it is not just this device Conexant comes with other devices too, check it by yourself in device manager etc. After update you can reinstall those drivers.
If that doesn't help then uninstall any headphone or external audio driver and only hit and try will help.
Hope above information can help you.
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