I've somehow created a second account and don't know how to remove it.

Open administrative Powershell and type or copy and paste:

1) Get-LocalUser
2) Get-LocalUser | Select *
3) sfc /scannow
4) dism /online /cleanup-image /scanhealth
5) dism /online /cleanup-image /restorehealth
6) sfc /scannow
7) chkdsk /scan

8) When these have completed > right click on the top bar or title bar of the administrative command prompt box > left click on edit then select all > right click on the top bar again > left click on edit then copy > paste into the thread

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PS C:\Users\QXRTZ> 1) Get-LocalUser
At line:1 char:2
+ 1) Get-LocalUser
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 2) Get-LocalUser | Select *
At line:1 char:2
+ 2) Get-LocalUser | Select *
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 3) sfc /scannow
At line:1 char:2
+ 3) sfc /scannow
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 4) dism /online /cleanup-image /scanhealth
At line:1 char:2
+ 4) dism /online /cleanup-image /scanhealth
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 5) dism /online /cleanup-image /restorehealth
At line:1 char:2
+ 5) dism /online /cleanup-image /restorehealth
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 6) sfc /scannow
At line:1 char:2
+ 6) sfc /scannow
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 7) chkdsk /scan
At line:1 char:2
+ 7) chkdsk /scan
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 1) Get-LocalUser
At line:1 char:2
+ 1) Get-LocalUser
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 2) Get-LocalUser | Select *
At line:1 char:2
+ 2) Get-LocalUser | Select *
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 3) sfc /scannow
At line:1 char:2
+ 3) sfc /scannow
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 4) dism /online /cleanup-image /scanhealth
At line:1 char:2
+ 4) dism /online /cleanup-image /scanhealth
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 5) dism /online /cleanup-image /restorehealth
At line:1 char:2
+ 5) dism /online /cleanup-image /restorehealth
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 6) sfc /scannow
At line:1 char:2
+ 6) sfc /scannow
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 7) chkdsk /scan1) Get-LocalUser
At line:1 char:2
+ 7) chkdsk /scan1) Get-LocalUser
+ ~
Unexpected token ')' in expression or statement.
At line:1 char:17
+ 7) chkdsk /scan1) Get-LocalUser
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 2) Get-LocalUser | Select *
At line:1 char:2
+ 2) Get-LocalUser | Select *
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 3) sfc /scannow
At line:1 char:2
+ 3) sfc /scannow
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 4) dism /online /cleanup-image /scanhealth
At line:1 char:2
+ 4) dism /online /cleanup-image /scanhealth
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 5) dism /online /cleanup-image /restorehealth
At line:1 char:2
+ 5) dism /online /cleanup-image /restorehealth
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 6) sfc /scannow
At line:1 char:2
+ 6) sfc /scannow
+ ~
Unexpected token ')' in expression or statement.
+ CategoryInfo : ParserError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnexpectedToken

PS C:\Users\QXRTZ> 7) chkdsk /scan

See OP.

Please copy and paste each command after the number and ).

For example:

Windows PowerShell
Copyright (C) Microsoft Corporation. All rights reserved.

PS C:\WINDOWS\system32> sfc /scannow

Beginning system scan. This process will take some time.

Beginning verification phase of system scan.
Verification 10% complete.