use new func in Tools.ps1 to get random file

Fix-WindowsHealth.ps1

@@ -1,5 +1,5 @@
 # Run SFC to check the filesystem, convert the result from Unicode to UTF8, delete the intermediate $tempFile
-$tempFile = [System.IO.Path]::Combine([System.IO.Path]::GetTempPath(), [System.IO.Path]::GetRandomFileName())
+$tempFile = Get-RandomTempFile
 $(sfc.exe /scannow) | Out-File $tempFile
 Set-Content -Path $tempFile -Value $(Get-Content -Path $tempFile -Encoding Unicode) -Encoding UTF8
 $SFCOutput = Get-Content -Path $tempFile

Tools.ps1

@@ -269,6 +269,12 @@ Function IsWindowsBuild {
 # Get the path to the TEMP folder (context dependent)
 Function Get-TempPath { Return [System.IO.Path]::GetTempPath() }
 
+# Get a random file name with random extension
+Function Get-RandomFile { Return [System.IO.Path]::GetRandomFileName() }
+
+# Get a random temp file in the current TEMP folder
+Function Get-RandomTempFile { Return [System.IO.Path]::Combine($(Get-TempPath), $(Get-RandomFile)) }
+
 # Determine if the system is 64-bit or not
 Function Is64bit {
     switch ( $(Get-CimInstance -ClassName Win32_OperatingSystem -Property OSArchitecture | Select-Object -ExpandProperty OSArchitecture) )