Hi,
I'm Pedro A, Independent Advisor and will help you
HEUR: Trojan.Script.Iframer is a malicious Trojan that can inject malicious code into the pages it targets. The Trojan is able to secretly infiltrate the system and download other malware, which can generate annoying popup ads and cause various serious security issues on your system.
It is extremely advisable to use a good antivirus tool and antimalware to eliminate the virus and also to detect any other possible vulnerability in your system.
If u have more doubts i will be happy to help you.