======SOLVED - CubeCart V6 Store Front Displays a Blank White Page======
  -Login to the admin dashboard of your CubeCart store.
  -On the left navigation menu near the bottom, find and click the 'Error Log' link and then select the 'System Error Log' tab at the top center.
  -The latest error should be near the top.  The error that I found referred to the following: gd.class.php:102 - Call to undefined function imagecreatefromjpeg()
  -I had moved my CubeCart website to a new IIS7 Web server on Windows platform, from an Apache Server, and the new server also had a PHP upgrade - from PHP 5.x.x (on Apache webserver) to PHP 7.x.x (on the IIS7 webserver on Windows)
  -I located the gd.class.php file in the '/classes/' folder of the CubeCart website on the server.
  -I opened the gd.class.php file using NotePad++ editor and went directly to LINE 102 referenced in the latest entry of the CubeCart system error log.
  -Line 102 was calling to a function requiring that the gd extension must be enabled in the windows server's php.ini file.  
  -Close the gd.class.php file within Notepad++ without saving any changes.
  -I needed to enable the php_gd2.dll extension within the php.ini file. On Windows server, PHP v7 was installed to the path 'c:\php\' and the .dll extensions are located in the path 'c:\php\ext\'
  -Locate and open the php.ini file in the php directory of your server using NotePad++ editor.
  -Remove the leading semicolon ';' from in front of the text 'extension=php_gd2.dll' (to enable the gd extension), and then save the php.ini file using NotePad++. 
  -Close NotePad++
  -Restart IIS Server
  -Go to the home page of your CubeCart store front
  -Voila!!! It's all there!!!

This Troubleshooting was based in part on the CubeCart knowlegebase: Hosting Issues located at the following link:
[[https://support.cubecart.com/knowledgebase/article/View/219/42/i-get-a-blank-white-screen-when-i-view-my-store]], which knowlegebase article was posted by Al Brookbanks on 29 October 2014 10:23 AM

=====Fix the '404 error' that displays after selecting the CubeCart menu and product links=====

  -The .htaccess file contains rewrite conditions, but IIS7 cannot interpret .htaccess like Apache2 webserver.
  -You need click on the URL Rewrite rules Icon within your website configuration in Internet Information Services, and import the .htaccess file (located in the root folder of the Website) 
  -The Website URL Rewrite rules that you import will be stored in a 'web.config' file in the root of your website
  -There may be one error upon import that will prevent you from saving the rewrite rules to the web.config file.
  -You need to delete the line 'RewriteBase /' before saving to the web.config file
  -Restart IIS server
  -Go test the store front of your website in your web browser. The secondary page links should no longer display the 404 error.

=====If You are Using IIS7, make sure that you install Microsoft URL Rewrite Module 2.0 for IIS (x64) or (x32) as applicable=====
  *The most current MS Installer (*.MSI) file name available at the time of this publication is '**rewrite_2.0_rtw_x64.msi**'
  *Find the 64-bit msi download here: [[https://www.microsoft.com/en-us/download/details.aspx?id=47337]]
  *According to the download page, the url Rewrite Module 2.0 provides a rule-based rewriting mechanism for changing requested URL’s before they get processed by web server and for modifying response content before it gets served to HTTP clients.