bob3160, my hardware is almost pre-historic. The new Avast 19 has made a huge difference to its responsiveness. Avast is now without peer in the anti-malware field as far as I am concerned.
If it can make an ancient AMD Sempron 3000+ single core 1.8Gz powered Windows 7 (x64) system actually sprightly, it must be good. I do like a gentler pace of web page loading. It gives me time to think.