Did Malware attack your website ?

Kindly do a security scan of your site and did not see any issues at this time, however check your  domain is currently on Google's blacklist, you can request that the warning be removed by visiting http://support.google.com/webmasters/bin/answer.py?hl=en&answer=168328 and request a review. Once they see that your site is no longer harmful to users, they will remove the warning.

In the mean time, I would recommend that you change your FTP logins for the domain in question and do a anti-malware scan on your local machine used to service that site.

Unable to view your website ?

This was done using two Plesk command lines that are executed at the command prompt. Here they are 
"%plesk_bin%\websrvmng.exe" --update-anon-password --domain-name=domain name.com
"%plesk_bin%\reconfigurator.exe" "/check-permissions=domain name.com"

Just paste this, line by line in the command prompt and press enter. The First command reset the anonymous IIS user password and the second command check for broken IIS permissions and fixes them.You just have to plug in the affected domain name. In this case it was domain name.com