Windows 10 boot slow Pre Session Init 40 seconds Aggressive LPM

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I had an issue where pc starts to boot than pauses for 40 seconds while Windows logo and dots are spinning, no harddrive activity and keyboard and mouse are powered off, after 41 seconds boot proceeds as normal. I used Windows Performance Analyser as per this post.

Investigation in Windows Performance Analyser shows Pre Session Init taking 41 seconds mostly doing idling.

boot timeline

Some process activity was detected at ntoskrnl.exe and ACPI.sys which led me to believe driver initialisation issues.

Serge

Posted 2018-04-14T00:54:43.407

Reputation: 101

Are you asking a question or just publishing information?  If you’re asking a question, please [edit] your post to make it clearer and more complete. Otherwise, break this up into a question and an answer; edit the question to be *only* the question, and then post an answer below it. – Scott – 2018-04-14T01:14:49.633

only ask the question (not both into 1 post) and add your findings into an answer – magicandre1981 – 2018-04-14T06:31:42.600

Thanks for pointing this out, splitting post into question and answer. Hope this would help someone trying to fit old hardware into new a motherboard. – Serge – 2018-04-16T08:10:02.487

Answers

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Various attempts to disconnect devices from motherboard pointed at DVD drive, diconnecting it reduced Pre Session Init from 40 to 10 seconds. Next, I attempted to tweak BIOS settings for SATA controller, particularly Aggressive Link Power Management, when it is off then there was no delays in boot. I hope this research would help someone.

Serge

Posted 2018-04-14T00:54:43.407

Reputation: 101

Asked: 2018-04-14T00:54:43.407

Viewed: 343 times

Active: 2018-04-16T08:08:08.567