This is a windows issue, not specifically an Excel issue. This is from the Windows help file-
To preview a document
1 In a folder window, click the document you want to preview.
2 On the File menu, click Quick View.
Notes and Tips
If the Quick View command is not on the File menu, there is no file viewer available for the type of file, or Quick View is not installed. To find out how to install it, click Related Topics below.
To change the way the document appears, click a command on the View menu in Quick View.
To preview a document on the desktop, use your right mouse button to click the document, and then click Quick View.
To preview another document, drag its icon into the Quick View window.
To edit the document, click the File menu, and then click Open File For Editing.
If you have more questions, go to Start, Help and search for "preview". HTH.