In an even more surprising move, Microsoft released a huge security patch, KB 3074663, for those who install build 10240.įirst, a note about terminology: I call build 10240 the RTM build because it has been released to hardware manufacturers and other partners outside of Microsoft to be installed on new PCs and tested for new software. In a surprise move yesterday, Microsoft released build 10240 - the so-called RTM build - for Windows Insiders running the Windows 10 Technical Preview in both Fast and Slow rings.
