Build 10051 is the latest leaked version. I got my hands on it and there's not a lot different from 10049 asides new Mail and Calendar apps (remember that the Mail and Calendar apps were broken in Builds 10041 and 10049?) They look kind of nice but for some reason the apps won't sync with my Office 365 email account - the apps in the earlier builds of 10 and the apps in 8.1 do though. The People app in 10051 is still broken.
Screenshots of the Enterprise SKU of 10056 were leaked yesterday by the renowned Russian hacker group, WZor, who are the people that have leaked a few Windows 10 builds and screenshots. The Recycle Bin now has a new icon and apparently the Start Menu is sizeable again just like it was in builds prior to 9926. The full build will probably leak within the next few days I reckon:
http://www.winbeta.org/news/windows-10-build-10056-screenshots-leaked-full-build-may-follow
How can I pick up the latest version?
My system keeps BSODs every so often, and I've had this build for at least 3 months I reckon
Which build are you running at the moment?
If you want to use 10049 (which is the latest official public/'non-leaked' release) then you can install Build 9926 fresh and then update to 10049 in Windows Update. Download the Build 9926 ISO here:
http://windows.microsoft.com/en-gb/windows/preview-iso
Alternatively, if you Google 'Windows 10 10049 ISO' and click on the top result you can download a supposedly official Build 10049 ISO (32-bit or 64-bit). I have downloaded the 64-bit ISO but I haven't tried it yet. I won't put a link in this post just in case posting a link to an unofficial download location breaches any forum rules regarding software piracy.
If you're experiencing BSODs it might be due to your hardware (check RAM and/or hard disk - usual culprits) or it could be down to your hardware drivers not working correctly with Windows 10. Remember that beta operating systems aren't the best operating systems to use on your main computers because of things like this.
I still think the earlier NT 6.4 builds (9841, 9860 and 9879) are more stable than the NT 10 builds. Some people are now speculating that Windows 10 RTM could be released as early as June!
http://www.neowin.net/news/windows-10-rtm-june-is-the-target