Creating A Virus?

I want to understand the world of Virus's and Trojan's better than i do, so i figured id take and old computer i have and let a virus i created run through it to try and understand how they infect parts of the computer. So i got a virus builder that creates virus's through notepad nd i save tem in a batch file....but when i try to convert the batch file from a batch file to a exe file it says i dont have permission to the file and i should contact the file administrator. Now is this because the file is encrypted or something else, if it is encrypted how do i decrypt the file so i can convert it to a exe file and let it infect my junk computer?

Edited by Blade Zephon, 03 February 2011 - 09:50 PM.
Moved from Breaking Virus & Security News to a more appropriate location. ~BZ

Hello.

Regardless of your intent, you will not find assistance with creating a malware application here. We spend our time removing such things, not creating them. Even if your intent is non-malicious, there are others who could read this topic and use the information provided for malicious purposes.

If you are interested in the field of Malware Removal, I suggest you take a look at our training program. http://www.bleepingcomputer.com/forums/topic86678.html

~Blade