function Set-OSDComputerName {
    
         $ErrorProvider.Clear()
         if ($TBComputerName.Text.Length -eq 0) {
             $ErrorProvider.SetError($GBComputerName, "Please enter a computer name")
             return
            }
             if ($TBComputerName.Text.Length -gt 7) {
                 $ErrorProvider.SetError($GBComputerName, "Computer name cannot be more than 6 characters")
              return
             }
              if ($TBComputerName.Text -notmatch '^[F][0-9]{2,2}[a-zA-Z]{4,4}$') {
                  $ErrorProvider.SetError($GBComputerName, "Computer name must be named with <F> and <numbers> and <four random letters>")
                  return
              }                
                 else {                       
              $OSDComputerName = $TBComputerName.Text -replace "[\[\]:;|=+*?<>\/,]+", ''
              $temp_file = $temp_path + $OSDComputerName + ".txt"
        
                   if (Test-Path "\\lupinlicious\DeploymentShare$\Computers\$OSDComputerName") {             
                         $ErrorProvider.SetError($GBComputerName, "Computer name already exists. Choose another name")
                         return
                     }
                     New-Item -Path "\\lupinlicious\DeploymentShare$\Computers\$OSDComputerName" -ItemType File | Out-Null               
                     $TSEnv = New-Object -COMObject Microsoft.SMS.TSEnvironment 
                     $TSEnv.Value("OSDComputerName") = "$($OSDComputerName)"
                     $Form.Close()
                 }
                 }