Sometimes you might check your websites and see an image like one below:
This could mean that your website files are infected. Here are some steps to fix this issue.
1. Open a browser and navigate to Webmaster Central at <[http://www.google.com/webmasters> Click Search Console. Sign in to Search Console using a Google account. If you don't have a Google account, click Create an account. A new Google account doesn't mean you'll lose your existing email account with another company.
2. Once you are signed in, Click Add Property.
3. Type your site's URL in the box, then click Continue. You have the option to determine how to verify. If you verify, via domain, you will need to add a TXT record to your DNS zone in your domain section. You can also verify using URL Prefix, where you will need to download a file and upload it into the public_html folder in your cpanel. Enter your domain name and click continue.
4.You will be redirected to a different page depending on which option you choose to verify with. Copy the TXT record and add it to your DNS zone or download the file and upload into the public_html folder. Once you are done, come back to the page and click verify.
5. Once you are verified, you will be taken to the console dashboard where you can see details of your domain and check if there is any infected file. If there is, you will be notified immediately as shown in the screen shot below. Click on "Open Report" to display the list of issues about the domain
6. You will be taken to the page that shows the links in your website that has been infected. proceed to go to your file manager and completely delete all the links highlighted once done, go back to the google search console page and select the "request review" button
7. You will need to then fill a form to specify that all the issues have been fixed and the steps you took to fix them. Once you are done, click on "submit request".
It could take some time for the google team to review your request. Once they have confirmed that all the necessary links are no longer in your account, the deceptive site warning will be removed from your website.