My computer started to boot for 10 minutes. It has SSD system drive and was booting for 15 seconds previously.
Is it possible to know, what does it doing during this time? The delay occurs before logon screen appears. I mean what I am observing for a long time, is Windows animation of rolling dots. Once logon screen appears, computer works fast. I.e. I need to detalize what happen BEFORE logon screen, not autorunning programs of later stages.
It started suddenly today. First computer hanged in a huge way: it was beeping on mouse move. Very rare type of hang. I have rebooted it hard and it start to boot very slow.
Also it is unable to reboot automatically anymore. Simultaneously, on reboot, I see screen blinking meaning motherboard reboots (?) This tends me thinking it is a hardware-related problem.
UPDATE
Windows Performance tools shows, that slow occurs in the stage Session Init. Probably smss.exe is responsible for this.
It is just evident, that "session init" takes tremendous time.
UPDATE 2
Watching event Event Viewer --> Applications and Service Logs -->Microsoft --> Windows --> Diagnostics - performance -->Operational -->Event ID 100<--
Also indicates session init is guilty:
BootTsVersion 2
BootStartTime 2015-04-09T22:16:20.819659700Z
BootEndTime 2015-04-09T22:23:40.863859000Z
SystemBootInstance 154
UserBootInstance 150
**BootTime 377549**
**MainPathBootTime 347049**
BootKernelInitTime 39
BootDriverInitTime 517
BootDevicesInitTime 599
BootPrefetchInitTime 0
BootPrefetchBytes 0
BootAutoChkTime 0
**BootSmssInitTime 334923**
BootCriticalServicesInitTime 276
BootUserProfileProcessingTime 3399
BootMachineProfileProcessingTime 639
BootExplorerInitTime 4687
BootNumStartupApps 47
BootPostBootTime 30500
BootIsRebootAfterInstall false
BootRootCauseStepImprovementBits 0
BootRootCauseGradualImprovementBits 0
BootRootCauseStepDegradationBits 0
BootRootCauseGradualDegradationBits 0
BootIsDegradation false
BootIsStepDegradation false
BootIsGradualDegradation false
BootImprovementDelta 0
BootDegradationDelta 0
BootIsRootCauseIdentified false
OSLoaderDuration 600
BootPNPInitStartTimeMS 39
BootPNPInitDuration 1146
OtherKernelInitDuration 795
SystemPNPInitStartTimeMS 1932
SystemPNPInitDuration 350
SessionInitStartTimeMS 2292
Session0InitDuration 1751
Session1InitDuration 181
**SessionInitOtherDuration 332991**
WinLogonStartTimeMS 337216
OtherLogonInitActivityDuration 1108
UserLogonWaitDuration 6582
UPDATE 3
Found a solution same as here: Windows 8.1 boot hangs (~120s) in "Session Init"
UPDATE 4
Salution with hibernate disabling then reenabling helped with boot slow, but didn't help with reboot hang.
