Q: User Administration windows 7,10 I have account within Administators group
The  code Powershell  ( and  .NET  as well )
(new-object System.Security.Principal.WindowsPrincipal([System.Security.Principal.WindowsIdentity]::GetCurrent())).IsInRole("Administrators")

returns false

I ran command  
[System.Security.Principal.WindowsIdentity]::GetCurrent().Groups

in 2  cases  under my account and  Powershell as Administrative 
and  found  that Powershell as Administrative  has 4 more roles 
Powershell as Administrative

    BinaryLength AccountDomainSid              Value
    -- ----------------                        -----
    12                                         S-1-1-0
    12                                         S-1-5-114      - Extra
    28 S-1-5-21-573147726-3479669810-588349159 S-1-5-21-573147726-3479669810-588349159-1001
    16                                         S-1-5-32-544   - Extra
    16                                         S-1-5-32-551   - Extra
    16                                         S-1-5-32-559
    16                                         S-1-5-32-547   - Extra
    16                                         S-1-5-32-545
    12                                         S-1-5-4
    12                                         S-1-2-1
    12                                         S-1-5-11
    12                                         S-1-5-15
    52                                         S-1-11-96-3623454863-58364-18864-2661722203-1597581903-24264218...
    12                                         S-1-5-113
    12                                         S-1-2-0
    16                                         S-1-5-64-36


Powershell as Me
    BinaryLength AccountDomainSid              Value
    -- --------------------------              -----
    12                                         S-1-1-0
    28 S-1-5-21-573147726-3479669810-588349159 S-1-5-21-573147726-3479669810-588349159-1001
    16                                         S-1-5-32-559
    16                                         S-1-5-32-545
    12                                         S-1-5-4
    12                                         S-1-2-1
    12                                         S-1-5-11
    12                                         S-1-5-15
    52                                         S-1-11-96-3623454863-58364-18864-2661722203-1597581903-24264218...
    12                                         S-1-5-113
    12                                         S-1-2-0
    16                                         S-1-5-64-36

Question :
How can I set my account as truly admin?
