Remove-Sophos.ps1

Remove-Sophos.ps1

# Logging variables
$LogDirectory = 'C:\Users\Public\Logs'
$LogPath = 'C:\Users\Public\Logs\TFS_scripted_updates.log'

# Set download variables
$DownloadURL = ''
$ZapFile = 'C:\temp\SophosZap.exe'

# Create log folder if it doesn't exist
If (-Not (Test-Path -Path $LogDirectory)) {
	New-Item -Path $LogDirectory -ItemType Directory | Out-Null
}

# Create log file if it doesn't exist
If (-Not (Test-Path -Path $LogPath)) {
	New-Item -Name 'TFS_scripted_updates.log' -Path $LogDirectory | Out-Null
}

If (-Not (Test-Path -Path 'C:\temp')) {
	New-Item -Path 'C:\temp' -ItemType Directory | Out-Null
}

# Set local variables
$InstalledSoftware = Get-ItemProperty 'HKLM:\Software\Microsoft\Windows\CurrentVersion\Uninstall\*' | Select-Object DisplayName, DisplayVersion, Publisher, InstallDate
$InstalledSoftware += Get-ItemProperty 'HKLM:\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Uninstall\*' | Select-Object DisplayName, DisplayVersion, Publisher, InstallDate
$LogData = Get-Content -Path $LogPath
$LogCount = ($LogData -match "SophosZap2").count


# Download uninstaller
Function Get-SophosZap {
	If (($InstalledSoftware -match "Sophos") -and ($LogCount -le 1) -and -Not (Test-Path $ZapFile)) {
		Try {
			Invoke-WebRequest -Uri $DownloadURL -OutFile $ZapFile -UseBasicParsing
		}
		Catch {
			Add-Content -Path $LogPath -Value "[-][$(Get-Date)]: Error occured when downloading Sophos uninstaller."
			Return $False
		}
		Add-Content -Path $LogPath -Value "[+][$(Get-Date)]: Downloaded Sophos uninstaller successfully."
		Return $True
	}
	Else {
		Return $True
	}
}

# Execute Zap
Function Start-SophosZap {
	Try {
		Start-Process -FilePath $ZapFile -ArgumentList "--confirm" -NoNewWindow -Wait
	}
	Catch {
		Add-Content -Path $LogPath -Value "[-][$(Get-Date)]: Error occured when running Sophos uninstaller."
		Return $False
	}
	Return $True
}

# Delete SophosZap if uninstallation is complete
If (($InstalledSoftware -notmatch "Sophos") -and ($LogCount -ge 2) -and (Test-Path $ZapFile)) {
	Try {
		Remove-Item -Path $ZapFile
		Add-Content -Path $LogPath -Value "[+][$(Get-Date)]: Deleted Sophos uninstaller successfully."
	}
	Catch {
		Add-Content -Path $LogPath -Value "[-][$(Get-Date)]: Error occured when deleting Sophos uninstaller."
	}
	Exit 0
}

# Conditional logic to run removal function
If (Get-SophosZap) {
	If (($InstalledSoftware -match "Sophos") -and ($LogCount -eq 0)) {
		If (Start-SophosZap) {
			Add-Content -Path $LogPath -Value "[+][$(Get-Date)]: Initiated SophosZap2 successfully."
		}
		Else {
			Add-Content -Path $LogPath -Value "[-][$(Get-Date)]: Failed to uninstall Sophos."
		}
	}
	
	If ($LogCount -eq 1) {
		$Uptime = Get-Date (Get-CimInstance -ClassName Win32_OperatingSystem).LastBootUpTime
		$StringMatch = Get-Content $LogPath | select-string "SophosZap2" -simplematch
		$LastLine = $StringMatch[($StringMatch.count - 1)] | Out-String
		$LastDate = (Get-Date $LastLine.Substring(6, 19))
		
		If ($Uptime -gt $LastDate) {
			If (Start-SophosZap) {
				Add-Content -Path $LogPath -Value "[+][$(Get-Date)]: SophosZap2 second run successful."
			}
			Else {
				Add-Content -Path $LogPath -Value "[-][$(Get-Date)]: Failed to uninstall Sophos."
			}	
		}
	}
}