Download the file, then start the powerpoint viewer and then File:Open and open the file. Is there some reason that doesn't work?

Have you rebooted the computer after installing the powerpoint viewer? That might be what you need to do. After rebooting the computer you should be able to right click on the file and select open with from the contest menu and select powerpoint viewer.

When you click open with on the file and the box pops up, if you don't see the power point viewer as an option, down towards the bottom of the box there is a browse button. Click on that and go to where you installed the power point viewer

Sad to say that the answers supplied seem to be applicable to Windows XP. Windows 7 Home Premium is not giving me a browse option at all.

Did you download the file-yes nor no? If you downloaded and installed the PowerPoint viewer, it must exist within your installed programs list. Is it there-yes or no? If yes, then start it. Once PowerPoint viewer is started, there must be either a button which opens a new file or File:Open from the File menu. Click it-then navigate to the location where you downloaded the file and open it. It shouldn't be difficult...unless you don't where you downloaded the file to.

I'm using windows 7. When I right click on a file and select open with the selection box has a browse button. Here's a picture with the browse button in the lower right part:
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Good post Bob. Mine is nothing like that- but I wish it was!
The pps come as attachments to email, Windows Live Mail -I hate it. Right click on attachment pps:
Mine opens little window/box in center of screen.
Top left says "mail attachment" Top right has red "X".
"Do you want to open this file?"
"Name: Beautiful pictures.pps"
"Type: Microsoft PowerPoint Slide Show"

Then offers choice of "Open or "Cancel"
Selecting "Open" brings message: Big Red X
"This file does not have a program associated with it for performing this action. Please install a program or, if one is already installed, create an association in the Default
Programs control panel".
I do have Windows PowerPoint viewer installed- and have booted several times since then. It is in my programs list.

OK, something else to try. Click the start button. In the search box type 'associate a file type with a specific program'. This should find a link to that utility in the control panel. You can scroll down the list of file types and find the .ppt extension and set the powerpoint viewer as default there.

If Windows Live Mail really does not give you the choice of a right-click on the filename to take the file and SAVE AS to the folder of your choice (which would enable you to open the file after starting the viewer), then I would guess there is some security setting that is preventing you from doing so. If you really hate WLM that much, it's time to consider something else...either another email client or your ISP's own webmail. I use Thunderbird, FWIW.

Have you tried doing as suggested and actually saving the file to your computer out of the email(right click save as), once downloaded be sure you right click and scan it with your security programs of course before opening it. Once it is downloaded and scanned then right click and open, see if you can then use the viewer or if you are presented with the open with dialog box as in the above post by bob.

another option is to download and install the free Open Office which is a full suite of office products similar to MS Office it also includes a power point program and viewer, that may open the file in your email.
OpenOffice.org 3.2.0