If you are having problems installing or using the recently launched 10041 build of the Windows 10 Technical Preview, you might want to check some workarounds Microsoft has posted to see if they solve your problems.
Some users are getting this error message when they try to install Windows 10 10041, "Windows can't be installed because this PC has an unsupported disk layout for UEFI firmware." In a post on the Microsoft Community forum, the company admits:
For this build, the Windows setup team added a check to make sure systems are configured correctly for UEFI before they upgrade. The check we added was overly aggressive and is blocking people who should not be. We are working on solving this in our next build.
The post has a workaround on this issue that involves making a creating a Microsoft Reserved Partition (MSR). It's quite detailed and you can check out the full workaround at the Microsoft Community post.
Some other Windows 10 10041 users have reported on audio issues when using drivers from Realtek. The Microsoft Community forum has posted work that some of those problems have since been resolved but a couple won't be fixed until the next build. In addition, Microsoft is still investigating reports on a couple of other audio issues. Again, all of the details can be checked out on the company's forums.