How is the blue screen called when scandisk runs before login?

Question

When scandisk is scheduled to run before login, it runs in a special blue screen. What is this special mode, does it have a name?

Do other programs run in this blue screen, or is it only for scandisk?

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Edit: In the answer of my other question (the one which sparked this actually), they mentioned WinInit and WinLogon. Is that how that mode is called?

score 1 · Accepted Answer · answered Mar 31 '15 at 08:27

There is a multistring registry key that controls the execution of system programs at boot:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\BootExecute

By default this key is populated with:

autocheck autochk *

When chkdsk is called to run on the C: drive, the command is modified to include:

autocheck autochk /p \??\C:

Other applications other than chkdsk can be run, such as filesystem converters, boot time defragmenters, and rootkit cleaners.

How is the blue screen called when scandisk runs before login?

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