I need help!

[CbrMas1]

How do I make my own antivirus or antispyware program?

[NogDog]

Not to sound like a smart-@$$, but if you have to ask, then you probably aren't ready to even think about tackling such a project - it is non-trivial and requires expert knowledge in a number of areas. (I, for one, am certainly happy to leave this to those who know much more about it than I do.)

[scragar]

to try to make your own anti-virus you first need to know a software making program, preferably ASM or C++(as those and VB are all I need to know it should be the same for most people, but since VB only runs on windows machines so you should ignore it..)
Then you need to know about almost every virus that you want to stop and then search for them using a simple search algorithm...

get that far and you can begin writing a basic AV prog.