Avira Premium Security Suite and Spyware Doctor with Antivirus do not appear to be compatible. My opinion when it comes to protecting one’s system is that a layered approach is more highly effective then relying on a sole program to protect your system in it’s entirety. It’s a simple fact that there’s no one program in existence that will protect your system from absolutely everything. If that program existed there would be no need for competition.
I already had Spyware Doctor with Antivirus running on my system when I decided to try Avira Premium Security Suite. I’m a big fan of Avira and with good reason. Time and again Avira has proven an exceptional product both in detection and cleaning as well as prevention. I say this with much experience in professional virus/malware/rootkit removal and cleaning of systems.
Unfortunately the combination of Avira Premium Security Suite and Spyware Doctor with Antivirus ended in a lot of system freezing and Avira would lock up entirely while running a full system scan. I noticed that while browsing the web in Firefox it would freeze and respond intermittently. Running a full scan with Avira would result in the program freezing in a random spot and locking up entirely. It was impossible to even kill the process manually. It would require shutting down the system and rebooting.
It’s kind of too bad as I like both programs but there are lot’s of other combinations of Anti-Virus programs out there that work quite well in tandem. One of those combinations is Avira along with Microsoft Security Essentials.