Hi, we're a team of web-developers (Drupal developer, designer and programmer) from Eastern Europe. We've got a 4 year of successful experience in building and maintaining Drupal sites of various difficulty.
We've done a number of projects on enhancing sites' security, clearing them from viruses and malicious attacks, improving the performance and download time, integration of new modules and design.
In addition to fixing the problems that you mention we can run a general check-up of your site as a bonus and suggest ways to make improvements. Could you provide your site-link so we could see if there are any performance issues that we can spot right away?
Looking forward to discussing the details of your project with you in person.
Best regards,
Elena