1. Install [Avast PRO] or [Avast Internet Security] or [Avast Premier] as trail
(DEMO)

2. Disable Self-Protection module from Avast.
You can re-enable it later.

3. XP users please double click [AVAST XP ZeNiX.reg] to activate my 2050.

4. Run [Avast 2050 by ZeNiX], and reboot.

5. Done

You can enable Avast's autoupdate with 2050.
You can re-enable Avast's Self-Protection module now.