When we see this type of alert on browser, it’s indicated that the site content malicious software (malware).
Procedure to clean up the site:
1.At first you have to go online malware scanner site: ‘sitecheck.sucuri.net’
2.Hit the scan website button.After scan is completed you find a result look like below screenshot.
3. Then go to the INFECTED URL using FTP and clean the infected code.
4. After cleaning the content rescan the site and you will find screen like below screenshot.
5. Then go to the URL: https://www.google.com/webmasters/tools/home?hl=en
6. Put the domain name and hit continue and follow the below mentioned steps.
Also you can use a paid automatic malware scanner and cleaner: Site lock For more information visit our website http://security.diadem.in/sitelock.php.