Please follow the steps below to enable access to Web Folders using Windows Vista.
First you need to download Web Folders drivers for vista.Please visit http://www.microsoft.com/downloads/details.aspx?FamilyId=17C36612-632E-4C04-9382-987622ED1D64&displaylang=en.
You should see the following page:

Press the Download button. You should see the following page:

Save the file to your local machine.
Once downloaded, double-click the file and proceed with the installation.
Select Computer from the Start menu.

Right Click on an empty area on the new window, and select Add a Network Location.

On the first of a series of "Add Network location" windows, click Next.

Select "Choose a custom network location" and click Next.

Enter the URL of the network address and click Next.
The Network address is as follows:
https://my.senecacollege.ca:443/bbcswebdav/users/type_your_username_here

Enter the My.Seneca User Name and Password and click OK.
Note: To maintain security, do NOT check the Remember my Password check box.
Provide a Name for the network location.
This is the name of the folder you will use to access your files.

Press Finish.