webscriptingnoob

Hey there. I've just installed Apache 2.2 and since I've been following a guide to install it I'm pretty sure I've done so correctly. My issue is that after i installed it the guide advised a test to see if it was installed correctly by opening up my web browser and visiting "http://localhost" i followed this step but when the webpage opened it was blank and a download window appeared. I tried to use the open with option with my web browser but still got nothing. Has anyone else come across this issue? If so can you advise a solution? Thanks in advance