Hey,
I’ve a long time Avast user and I never had a bad experience with this software.
However, the UI lags on Windows 7 with Aero enabled. Is this intentionally?
My system definitely exceeds the requirements for Windows 7 Ultimate 32-bit.
What UI operation(s) in particular?
What version and product of Avast are you using? Did you recently do an Avast upgrade or a clean install?
Have there been any changes to your system lately?