Hello
@2010barba & welcome to the community!
As you can see, members here happily share a wealth of experience along with useful information that comes from venturing into the new & (sometimes) unknown.
If there is a particular reason you are considering one or the other of Panda & Ad-aware free (..recommendations?
) using either of them yourself would prove to be the most effective & satisfying.
You've nothing to lose, in addition to good advice, by trying what you'd like.
Of the free versions mentioned, I have used only (3) Ad-Aware, Avast!, & Comodo. Although I haven not tried Panda yet, I would be very happy to do so. Experienced members have both recommended and warned me concerning Ad-Aware & Comodo.
Personally, I have not had any bad incidence with either of these 3 I've tried. Comodo requires more attention (or obsession) which is among it's virtues along with it's protection, and I like it on our XP system.
Ad-Aware, on my Windows 8.1 system, took long to scan, but did not suffer false positives.
I continue to use Avast! which is my personal choice among the free AVs mentioned which offers...
- Uncomplicated & active warnings of suspicious websites.
- Alerts (similar to UAC with hardened mode set at 'moderate') when apps. such as browser updates make changes to the system. This can be easily listed as approved and remembered.
- Quick & efficient scans & updates.
When Avast! expires (next month) I'm going to try Emsisoft's highly aclaimed Anti-Malware
https://www.emsisoft.com/en/software/antimalware/
(free for 30 days) before
I shall decided.
PS
Look!
@gricardo21 lists it on his signature too!