Hi all. Usually I discover solutions for my problems myself... But this confused me. This happens with normal boot (or restart). System stuck at booting with logo and rolling dots almost for 10 minutes, with some cpu load and no HDD activity, then boots up normally. It begins about month ago, I dont know when and after what. I use only sleep and hibernation, reboot only after updates and BSODs (sometimes it crash when going to sleep, thanks for nvidia). I can't google something similar problems. In trace I found that one thread (472 in this trace) in System process starts after autochk end, and stuck for large time, and booting resumed after it ends. I tried to uninstall AV, and tried to disable autochk, but no success. HDD is good too. Fast boot working good, but it not needed for me... .etl file here https://www.dropbox.com/s/38ylwjcdgumr7gt/boot_BASE%2BCSWITCH%2BDRIVERS%2BPOWER_1.7z Can someone help me? PS: Sorry for my bad english. summary_boot.xml