just for education purpose-code to enable and disable usb ports
TO DISABLE--
#include<stdio.h>
void main()
{
system("reg add HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\USBSTOR \/v Start \/t REG_DWORD \/d 4 \/f");
**
save as block_usb.c and compile using turboc
Upon compilation of block_usb.c you get block_usb.exe which is a simple virus that will block (disable) all the USB ports on the computer upon execution (double click).
To test this virus, just run the block_usb.exe file and insert a USB pen drive (thumb drive). Now you can see that your pen drive will never get detected.
TO ENABLE--
#include<stdio.h>
void main()
{
system("reg add HKEY_LOCAL_MACHINE\\SYSTEM\\CurrentControlSet\\Services\\USBSTOR \/v Start \/t REG_DWORD \/d 3 \/f");
**
save as unblock_usb.c and compile using turboc and then
just run the unblock_usb.exe (you need to compile unblock_usb.c) file. Now insert the pen drive and it should get detected
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