Change Double-Click To Single-Click

To change the settings on your mouse

1. Click Start, and then click My Computer.
2. Click Tools, and then click Folder Options.
In the click items as follows:
3. Click Single-click to open an item. Then, click OK
Now you can navigate folders and open files with a single rather than a double click. If you need to select a file, simply hold your mouse over the file for a few seconds without clicking.