I carefully researched Bitdefender Internet Security 2013 reviews before purchasing the product. As a result, I purchased the product. Right away I was disappointed that I had to "repair" the installation in order to run Windows 7 check disk for my C: drive. Next I found I had to uninstall the product to be able to do a system restore and then reinstall it (and again "repair" it).
After installation I immediately noticed my Windows 7 system would drop dead when left on for any substantial amount of time, and I was constantly having to restart it.
I proceeded to take every measure to correct this, including running whole system antivirus scans, restoring from backup, and then upgrading the Windows 7 operating system. The same problem existed. I then formatted my C: drive and installed a completely new full installation of Windows 7 including reinstalling Bitdefender Internet Security 2013 and all of my other software. I had paid $10 to be able to reinstall Bitdefender.
In all cases, all current updates were installed for Windows 7 Ultimate.
The same system crashes kept occurring, and I finally suspected Bitdefender might be causing these crashes.
When I completely uninstalled Bitdefender and installed a current copy of another well known internet security program and changed nothing else, all the crashes stopped and the system has worked properly for 10 days now.
This has been a terrible experience that went on over 2 weeks. Attempting to get a response from Product Support was absolutely a waste of time, as they never responded.
I cannot recommend Bitdefender Internet Security 2013 for the above reasons.