[Rann_03]

i recently got my laptop a little bit slap accidentally. although running smoothly, even though it create inappropriate sound it vibrates, when i tried renaming a file name it always alarms me that if i change the file name or if I rename a file name the extention might not be useful. but before it doesnt alarms whenever I change file names in my files. now i have to put up the extensions when saving i always have to put either .jpg, .bmp or .gif to save a picture. what went wrong? how come this happened?