diff --git a/SharePointFunctions.ps1 b/SharePointFunctions.ps1
index b80790c..14ac83b 100644
--- a/SharePointFunctions.ps1
+++ b/SharePointFunctions.ps1
@@ -458,41 +458,46 @@ function Convert-Files {
 
             # Convert the file to XLSX
             $xlsxFileName = $originalFileName -replace "\.xls[m]?$", ".xlsx"
-            # Use Join-Path to properly handle paths with spaces
+            # Before the Excel conversion, get the full paths and clean them
             $xlsxPath = Join-Path $env:TEMP $xlsxFileName
             $downloadPath = Join-Path $env:TEMP $originalFileName
 
-            # Convert the paths to proper Windows paths
+            # Clean the paths and ensure they're valid
             $xlsxPath = [System.IO.Path]::GetFullPath($xlsxPath)
             $downloadPath = [System.IO.Path]::GetFullPath($downloadPath)
 
+            # Verify the download file exists
+            if (-not (Test-Path -LiteralPath $downloadPath)) {
+                throw "Downloaded file not found at: $downloadPath"
+            }
+
             try {
                 # Open Excel
                 $excel = New-Object -ComObject Excel.Application
                 $excel.Visible = $false
-                $excel.DisplayAlerts = $false  # Suppress Excel alerts
+                $excel.DisplayAlerts = $false
                 
                 try {
-                    # Convert paths to proper format for Excel
-                    $excelDownloadPath = $downloadPath -replace "\\", "\\"
-                    $excelXlsxPath = $xlsxPath -replace "\\", "\\"
-                    
-                    $workbook = $excel.Workbooks.Open($excelDownloadPath)
+                    # Use proper path handling for Excel
+                    $workbook = $excel.Workbooks.Open([string]$downloadPath)
                     
                     # Save as XLSX using Excel constants
                     $xlOpenXMLWorkbook = 51  # Excel constant for XLSX format
-                    $xlNormal = 1  # Excel constant for normal save
                     
-                    # Use the standard SaveAs method
-                    $workbook.SaveAs($excelXlsxPath, $xlOpenXMLWorkbook)
-                    $workbook.Close($true)  # True to save changes
+                    # Create a temporary filename without spaces
+                    $tempXlsxPath = Join-Path $env:TEMP ([System.IO.Path]::GetRandomFileName() + ".xlsx")
                     
-                    Start-Sleep -Seconds 2  # Give Excel more time to finish saving
+                    # Save to temporary file first
+                    $workbook.SaveAs([string]$tempXlsxPath, $xlOpenXMLWorkbook)
+                    $workbook.Close($true)
                     
-                    # Verify the file was created using robust path checking
-                    $verifyPath = [System.IO.Path]::GetFullPath($xlsxPath)
-                    if (-not (Test-Path -LiteralPath $verifyPath)) {
-                        throw "Excel SaveAs succeeded but file not found at: $verifyPath"
+                    # After Excel is closed, copy the file to the desired location
+                    if (Test-Path -LiteralPath $tempXlsxPath) {
+                        Copy-Item -LiteralPath $tempXlsxPath -Destination $xlsxPath -Force
+                        Remove-Item -LiteralPath $tempXlsxPath -Force
+                    }
+                    else {
+                        throw "Excel SaveAs failed to create temporary file"
                     }
                 }
                 finally {
@@ -506,7 +511,9 @@ function Convert-Files {
                     [System.GC]::WaitForPendingFinalizers()
                     
                     # Force Excel process cleanup
-                    Get-Process -Name "EXCEL" -ErrorAction SilentlyContinue | Where-Object { $_.SI -eq [System.Security.Principal.WindowsIdentity]::GetCurrent().SessionId } | Stop-Process -Force
+                    Get-Process -Name "EXCEL" -ErrorAction SilentlyContinue | 
+                        Where-Object { $_.SI -eq [System.Security.Principal.WindowsIdentity]::GetCurrent().SessionId } | 
+                        Stop-Process -Force
                 }
                 
                 $script:txtStatus.Text += "Successfully converted to: $xlsxFileName`n"