how to reformat my computer by using external cd rom?

Question

my original cd rom is not working. but i don't know how to reformat using external cd rom because the computer can only detect the external cd rom in window. any idea?

there's four options in boot device: network, cdrom(original), hard disk, and removable device(floppy disk). the floppy disk cant be remove from my computer because it's build in. what to do now?

the main reason i want to reformat is because when i watch video, it's always lagging (but not the sound). i already move everything thing (back up file) to external hard drive, so the hard disk has nothing inside beside basic things. i done the disk difragmenter, but nothing has change. (about 6 months ago, when i watch video, it wont lag). now when i open a video file, either the window media player or explorer.exe is running very high (up to 100% capacity which can be view from task manager). they run so high (window media player) but still lagging.

btw, my com is compaq and using window XP.
thanks.

Answer 1

try this
Copy I386 folder from WinXP cd onto the harddrive, say in D drive or partition
- run 16bit Windows XP installer
-start > run type cmd , press ok
type D:\smartdrv.exe press enter
type D:\I386\winnt.exe press enter

- follow the onscreen instructions

Answer 2

I am not sure, you downloaded a video onto your hard drive?? Or did you take a video from your hard drive and downloaded it onto a disk (software) ? Hard drive is inside, cd-rom is a place you can either read it or copy to it. Look at it like a cassette.I do not understand how ----well lets put it this way--its hard DRIVE--which is basically your coputer, floppy is or use to be a small small square or a large floppy disk. If this is a dvd that you copied onto your computer, then why dont you just delete it? Also since it is causing problems just copy on to a recordable dvd disk? OK. either you copied from a media access, or you downloaded it onto your computer. If so, delete, or copy to disk. I know you can I use to use the same comp with same version of windows.