Do you know what "Picture Viewer" you are using?
Usually there is a name in the title bar, (the blue bar along the top), or if not, in the Help menu, (Help > About).
You see what confuses me is where you say, "it is opening graphics and click the Next button". What is opening graphics? What program? A lot of graphics programs will have next buttons, but many will only show one picture at a time, and to open another one, you would have to goto File > Open, and then navigate to where the next picture, (image), is.
Tell me, what process do you go through to see pictures? How do you get to the first picture to see it? Do you have an icon on your desktop which when you double click allows you to open images? If so, what is the name of the icon? If not, do you goto Start > All Programs, then select a program? If so, which program?
One thing you should also understand. When you visit web sites, eg this site here on CNET, the site downloads many images as well as the messages, links, etc. All the images you see on this page are images downloaded to your computer. They are stored for later use as "Temporary Internet Files", (TIF), and then if ever you come back to this site, your internet browser looks through the TIF to see if images are there first, before downloading again from the web site.
So, on your computer there will be a folder for Temporary Internet Files, and on Windows XP they are stored on your hard disk at C:/Documents and Settings/%UserName%/Local Settings/Tempoary Internet Files, (where %UserName% is your user name for your computer.
Try this. Right click the Start Menu button, and select "Explore". What opens is a program called Windows Explorer, and this is a most valuable program for exploring what folders and files you have on your computer hard disk. If you use it to explore, you may be amazed at how many files your computer hard disk has on it.
The program window is split into 2 panes. The left pan is used to navigate to different folders, and the right pane is used to see what files are in each folder.
On the left, Your name can be seen as a folder, with sub-folders underneath it, (it is like a family tree). The Start Menu should be highlighted. Look above that for "Local Settings", and click the + sign to the left of it.
Below Local Settings you will see more folders, one of which is "Temporary Internet Files". Highlight that, and you will see on the right a whole list of files. This represents your recent visits to web sites. Use the scroll down bar on the far right to scroll down and see what sort of files you have.
Look at the column headers above, and find "Type". In this column you will see the types of files, eg Text Document, or GIF Image or JPEG Image. Find a JPEG Image file and double click it. This will be an image from a web site you have visited recently.
but, look carefully at the program that opened when you double clicked that file. What program is it? Is it the same program that you have called "Picture Viewer"?
Have a read of what I have said, do some exploring, and come back with more information if you need to.