diff --git a/SharePointFunctions.ps1 b/SharePointFunctions.ps1
index 71ef43e..10c1360 100644
--- a/SharePointFunctions.ps1
+++ b/SharePointFunctions.ps1
@@ -473,6 +473,10 @@ function Convert-Files {
             $xlsxPath = Join-Path $env:TEMP $xlsxFileName
             $downloadPath = Join-Path $env:TEMP $originalFileName
 
+            # Convert the paths to proper Windows paths
+            $xlsxPath = [System.IO.Path]::GetFullPath($xlsxPath)
+            $downloadPath = [System.IO.Path]::GetFullPath($downloadPath)
+
             try {
                 # Open Excel
                 $excel = New-Object -ComObject Excel.Application
@@ -482,12 +486,14 @@ function Convert-Files {
                 try {
                     $workbook = $excel.Workbooks.Open($downloadPath)
                     
-                    # Save as XLSX - use the full path with quotes
+                    # Save as XLSX using the full path
                     $workbook.SaveAs([string]$xlsxPath, 51)  # 51 = xlOpenXMLWorkbook (*.xlsx)
-                    $workbook.Close($false)
+                    $workbook.Close($true)  # True to save changes
+                    
+                    Start-Sleep -Seconds 1  # Give Excel time to finish saving
                     
                     # Verify the file was created
-                    if (-not (Test-Path $xlsxPath)) {
+                    if (-not (Test-Path -LiteralPath $xlsxPath)) {
                         throw "Excel SaveAs succeeded but file not found at: $xlsxPath"
                     }
                 }