Create a nicer UI interface: make it more attractive.
Make the activation be account subscription base like Kaspersky.
Make the initial file scan faster, able to scan rootkit,
Add more useful add-on like integrate with Microsoft Office to scan macro.
Show more file information when scanning the suspicious file that not in whitelist.
Support Trust Module Platform inside a computer: able to check the hash of a common file.
Suggest: Create a online cloud database for all the file it scan for enterprise use.