AV-C's rating system (from high to low) goes:
Advanced +, Advanced, Standard, Tested.
Their latest test results for _free_ products showed:
Avast Free: Advanced
MS Sec Essentials: Advanced
AVG Free: Standard
Are there any other free products in the test that I didn't recognize?
NAV 18.5.0.125 got an Advanced rating (second level group).
Its detection rate was worse than the free Avast and MS SE products.
Its false positives were worse than the free MS SE.
Its scan speed was slower than the free Avast and AVG.
What does all this mean?
There is no "straight line" results for any product. Sometimes they will be higher, sometimes they will be lower, over a long period of time.
No product is perfect.
Observations:
1. In the four _2010_ AV-C tests, NAV got 3 Advanced Plus and 1 Advanced. That's good.
2. Five other products got Advanced Plus in all 2010 tests:
G-Data, Avira, F-Secure, Bitdefender, Escan. That's very good.
3. In the first 2011 test, NAV got an Advanced and they were towards the bottom of that second level group.
4. Symantec declined to participate in the second 2011 test.
Allegedly it was because there was no network connection allowed. There is an old saying in football: "It rains on both sides of the field." That is, don't whine when you have the same conditions as your competition. Just compete and let the best team win. Some products still got Advanced Plus ratings under this condition. Why shouldn't Symantec?
5. Overall, I would prefer that AV-C a) run tests more often (per year) with internet connection allowed to test real-world conditions; b) test more products (e.g., mbam); and c) not get permission from and not get paid by the product manufacturers.
And then there's 6.
Overall I'm satisfied with Symantec. It goes back to not expecting perfection of anything. Over a period of time, although perhaps not most recently, Symantec has been at or near the top.
My strongest criticism is the time it takes them to fix something once a problem has been identified. They seem to move with the speed of a glacier.
Their best "feature" -- which happens to have nothing to do with their developers -- is this forum. It is superior to most other AV product forums.