Failed to uninstall Sophos AV

Hello.

I need to uninstall Sophos endpoint from Win7Pro 64bit PC.

I logged-in PC with local Administrator accout and uninstalled these components from control panel without problem.

-Network Threat protection

-System Protection

Removal error happned when I tried to uninstall Sophos Anti-virus.

I took a log by using command line, but can't see what is the problem is.

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MSI (s) (A4:A8) [08:26:13:901]: Note: 1: 1725

MSI (s) (A4:A8) [08:26:13:901]: Transforming table Error.

MSI (s) (A4:A8) [08:26:13:901]: Transforming table Error.

MSI (s) (A4:A8) [08:26:13:901]: Product: Sophos Anti-Virus -- Removal failed.

MSI (s) (A4:A8) [08:26:13:901]:　Product: Sophos Anti-Virus、ProductVersion: 10.7.2.49、: 1033、: Sophos Limited、Error: 1603

MSI (s) (A4:A8) [08:26:13:901]: Deferring clean up of packages/files, if any exist

MSI (s) (A4:A8) [08:26:13:901]: MainEngineThread is returning 1603

MSI (s) (A4:B0) [08:26:13:901]: No System Restore sequence number for this installation.

=== Log End : 2017/12/14  8:26:13 ===

MSI (s) (A4:B0) [08:26:13:901]: User policy value 'DisableRollback' is 0

MSI (s) (A4:B0) [08:26:13:901]: Machine policy value 'DisableRollback' is 0

MSI (s) (A4:B0) [08:26:13:901]: Incrementing counter to disable shutdown. Counter after increment: 0

MSI (s) (A4:B0) [08:26:13:901]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2

MSI (s) (A4:B0) [08:26:13:901]: Note: 1: 1402 2: HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Installer\Rollback\Scripts 3: 2

MSI (s) (A4:B0) [08:26:13:901]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  Counter after decrement: -1

MSI (s) (A4:B0) [08:26:13:901]: Restoring environment variables

MSI (s) (A4:B0) [08:26:13:901]: Destroying RemoteAPI object.

MSI (s) (A4:68) [08:26:13:916]: Custom Action Manager thread ending.

MSI (c) (18:F8) [08:26:13:916]: Decrementing counter to disable shutdown. If counter >= 0, shutdown will be denied.  Counter after decrement: -1

MSI (c) (18:F8) [08:26:13:916]: MainEngineThread is returning 1603

=== Verbose logging stopped: 2017/12/14  8:26:13 ===

Any ideas?

Thank you.