Level 63
Four months ago we reviewed Bitdefender Internet Security 2014. The developer has just released the 2015 version of the antivirus application, bringing in new features and improvements concerning usability. We had the opportunity to take a look at the new product a bit early and evaluate it for ourselves.
NOTE: Bitdefender Internet Security 2015 was tested on 64-bit Windows 8.1 Pro.

Performance results
A collection of 8,502 virus samples was submitted to the test, in order to verify Bitdefender's threat detection ratio. The test machine was an Intel Core i5-3470 @CPU 3.20GHz with 12GB RAM and 500GB Seagate Barracuda ST500DM002 7200RPM, running Windows 8.1 Pro. Default settings were applied. The collection did not include zero-day threats.The real-time guard was excellent! As soon as we triggered the extraction procedure of the 8,502 virus samples from the password-protected archive, Bitdefender immediately picked up on it and started eliminating files while remaining completely silent (no kind of notifications were shown). In the end, it left behind only 225 files.

In the next step, we proceeded with a contextual scan to find out whether the tool was capable of detecting and removing more files, and we were right. It detected and eliminated 207 extra files, leaving behind only 30 items. Overall, Bitdefender had a success rate of 99.6%.

In order to evaluate the app's scan speed, we ran a system scan (the primary drive had 156GB occupied space). Default settings were applied. Bitdefender finished the scan job in roughly 1 hour and 36 minutes.

No false positives were spotted in these tests.

CPU and RAM consumption was minimal. The tool was completely stealthy.

The Good

The redesigned interface definitely looks cleaner than the old one. Bitdefender's firewall has been simplified to allow less experienced users to configure it. The new profiles for work, games and movies have handy customization settings.

The real-time guard is highly responsive and does an excellent job. Virus detection ratio was outstanding. Scan jobs were fast, while CPU and RAM usage was low.

The Bad
Although the interface is pretty attractive overall, some windows blend together depending on the order in which they were accessed.

The duplicate finder takes a really long time to sort files into groups after finishing a scan job.

The app sometimes becomes unresponsive when attempting to stop or cancel scan jobs.

The Truth
The new toolbox with PC tuneup features was not really necessary for an antivirus utility, since other apps which specialize in this category offer more advanced settings. Nevertheless, they are welcomed to quickly resolve common issues, in addition to the new profiles with optimized settings for working, gaming and watching movies.

Built to last, Bitdefender continues to dominate the anti-malware solutions community. Since this is a brand new edition, professional tests have not been carried out yet (e.g. AV Comparatives, Virus Bulletin), but we're certain that Bitdefender Internet Security 2015 will continue to impress as far as real-time responsiveness, virus detection ratio, scan speed and resources consumption are concerned.

User Interface:
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Retired Staff
As far as I can remember Softpedia has always gave BitDefender products a 5 star review, even the version that was known to have big problems.
I wonder how much BitDefender pays Softpedia for their 5 star reviews?

Enjoy!! :D