Go onto your server via you’re ftp program… something like filezilla.
Open your Header, Index and Footer.
Look for a string of gobbledegook within <script type=”javascript”> tags. May vary depends what you happen to have.
Delete this.
There is a possibility your server wont allow it to be deleted whilst on the server, if so… download the files, remove the code and delete the one on the server then upload the clean ones. Don’t try and overwrite if it denies you changing them firsttime around cos it wont work.
You’re looking for something like:
<script type=”text/javascript”>
function(asdjgs…. ETC)
</script>
At least thats what I’m used to removing for people ??
Once you’ve done those files, double check every other file on the server. Including your plugins.