Norton Antivirus, Norton Internet Security and almost all other desktop facing products of Symantec use HTMLayout and the Sciter since 2007.

McAfee - not.

But these AV and security providers - yes:

- ESET (NOD32 Antivirus)

- AVAST Antivirus

- AVG Antivirus

- Bitdefender Antivirus

- Comodo Antivirus

- Dr.WEB Antivirus

- WEBROOT Security Antivirus

- 360 ( 360.cn ) Antivirus

- Secui antivirus

So Sciter's code works on any PC that has any of these installed.