thank you mitchell for giving attention to my problem.
i have bought new laptop and spent most of the time in knowing about it.
i have windows 7 home premium. i m trying to open photos in windows photo viewer.
actually when i open any photo of a folder containing photos then it opens as usual, there is no problem there but the main problem arises when i press f11 or try to see those photos in slide show.
the photos in slide show opens in a random fashion rather i expect it to be in the same sequence as it is arranged (as by name generally).
explaining it more clearly if three photos are named as a, b, c, and are arranged by name then i expect when i start slide show then it should go in sequence from a then b followed by c but it happens in a random fashion.