Fix Version/s: None
I compiled a livecd.iso of r72865 with the 5-line patch from https://jira.reactos.org/browse/CORE-7826?focusedCommentId=82489&page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#comment-82489 to allow booting from USB.
When burned to a CD, it boots into the GUI and works fine on my Thinkpad T43 laptop.
When written to a USB flash drive with Rufus, a bugcheck occurs during the boot process. Backtrace photos with a Debug (Screen) boot are attached.
Per comment by HBelusca: "your latest screencaptures seems to show a crash in Win32k instead (not at all related with USB). This would be for a new bug report.
Bugcheck 0xd3 is DRIVER_PORTION_MUST_BE_NONPAGED. A similar problem can be seen at
CORE-11764, or CORE-10160 or CORE-10337 ."