Chrome Download generates a network error - google-chrome

Question

I have a website written in ASP.Net . On one page I have a table of images. Those images are stored in folders. There is a drop down box that displays the various folder names. When a user selects folder name from the drop down, then the images in that folder are displayed in the table.
The issue is that as soon as a folder is selected in the drop down box, then none of the images on the page can be downloaded in Chrome. If you right click on an image and select "Save Image As.." and click Save, Chrome returns with an error "Interrupted - Network Error" . You can click resume and the file downloads . You can open the image in a new tab and download the file. It also causes all images on the page to not download , including static ones such as the logo on the header. It works fine in Firefox. The images are quite small 420 K or so. The code for the page is very simple, in fact the code that occurs on page load is almost identical to the code that occurs on selecting an item from the drop box. This happens to all our website users , so definitely not some plug in or antivirus etc. Any ideas why selecting a folder from the drop box may cause an issue? Following is the page code
``
Imports System.IO
Partial Class m_Images
Inherits System.Web.UI.Page
Private imgPath As String
Dim strFolderName As String
Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
If Not IsPostBack Then
For Each d In System.IO.Directory.GetDirectories(Server.MapPath("~\images\ClientImages"))
Dim dir = New DirectoryInfo(d)
Dim dirName = dir.Name
lstCategories.Items.Add(dirName)
Next
strFolderName = lstCategories.SelectedItem.Text.Trim
imgPath = Server.MapPath("~\images\ClientImages\" + strFolderName + "\")
Session("FolderName") = strFolderName
Dim directoryInfo As DirectoryInfo = New DirectoryInfo(imgPath)
If directoryInfo.Exists Then
DataList1.DataSource = directoryInfo.GetFiles("*")
DataList1.DataBind()
Else
DataList1.DataSource = Nothing
DataList1.DataBind()
End If
End If
End Sub
Protected Sub lstCategories_SelectedIndexChanged(sender As Object, e As EventArgs) Handles lstCategories.SelectedIndexChanged
strFolderName = lstCategories.SelectedItem.Text.Trim
imgPath = Server.MapPath("~\images\ClientImages\" + strFolderName + "\")
Session("FolderName") = strFolderName
Dim directoryInfo As DirectoryInfo = New DirectoryInfo(imgPath)
If directoryInfo.Exists Then
DataList1.DataSource = directoryInfo.GetFiles("*")
DataList1.DataBind()
Else
DataList1.DataSource = Nothing
DataList1.DataBind()
End If
End Sub
Protected Function GetFolderName() As String
imgPath = Session("FolderName")
Return imgPath
End Function
End Class
``
Tried different desktops, and browsers. The problem is limited to Chrome (and Chromium based browsers such as Opera) . The problem occurred on at least 50 desktops scattered throughout the country.