Is there a way to boot as System user?

> different WInPE
which one ... name some

 

What is this question about?
After all, Win PE bootable from a pendrive - or otherwise - allows for almost all operations on other drives - including the system one?
Or I don't understand what's going on?

 

I think the question is how to do the same in a windows installation.

@ibay770

Never played with that, but likely you have to play with secpol.msc and users right and/or the settings in

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\ProfileList

 

Just use the AdvancedRun tool from Nirsoft and then run as a System user for each app you need System privileges for.

 

activate admin user and login to it and delete your previous user from there. from now you have only admin user in windows. don't know if it works on latest windows but i tried it long back on 10

 

for why ?

standard admin user are safe !

for run as system you need powerrun or nsudo or others tools , login as system with full acces are XP era and not recommanded

the best account are enable hidden super administrator ( but very bad idea )

 

Funny how these comments go. OP is not asking for your opinion, he's looking for an answer.
@acer gave an answer, apparently it doesn't work.

 

By default, WinPE is always booting as SYSTEM, which actually has more privileges than ADMINISTRATOR account (the latter is commonly used only to run TeamViewer)

With WinPE running as SYSTEM, you can perform any operation, except modifying some protected registry entries.
And this is fair enough for most WinPE users.

Some securable objects may grant access to SYSTEM only and not to ADMINISTRATOR.
ADMINISTRATOR is an actual account (for example, it has a password, which is commonly "1") whereas SYSTEM is not.
SYSTEM is a kind of "security principal" with more privileges.

What you're talking about are the TRUSTEDINSTALLER privileges.

As far as i know, only the Win10XPE project has the ability to generate WinPE with TRUSTEDINSTALLER privileges (which is also displayed as SYSTEM account).
It can natively bypass any permissions restriction. (Not documented. Try your luck on theoven.org)

For other "regular" PE's, you can achieve this only with 3rd-party programs (ex: Nsudo, PowerRun, AdvancedRun,...)
This non-persistent solution is very acceptable for such "rare" need.

You mentioned Sergei Strelec PE as an example.
It never came to my mind to verify if it's booting as SYSTEM, or as TRUSTEDINSTALLER which is, again, showing itself as SYSTEM too!
(He said once that he is occasionally using theoven.org projects, so maybe this is the case here)

WinPE privileges summary:
1/ TRUSTEDINSTALLER: No restrictions. (displayed as SYSTEM too)
2/ SYSTEM: No restrictions. (except modifying some protected registry entries)
3/ ADMINISTRATOR: Less privileges than SYSTEM but needed when admin password is required (ex: TeamViewer)