Avast Boot Time Impact – Does It Slow Down Your Windows?
In general Avast Antivirus 2015 is very light and doesn't slow your computer notably. But…
Apparently lot of avast! users are having compatibility issues after upgrading operating system to Windows 8.1. What usually happens is that avast! will completely disappears, and Windows will start saying you’re not protected. Then you’re being offered a Windows Defender, which is better than nothing but definitely not that good as avast! antivirus.
Luckily we have a simple fix for you. All you have to do is to get the latest avast! antivirus 2014 (version 9) which is fully compatible, and even certified to work on the Windows 8.1. Procedure depends whether you have already upgraded to Windows 8.1 (see point 1), or if you’re still running on some of it’s previous versions where avast! is working fine (see point 2).
If you have already upgraded to Windows 8.1 your avast! probably disappeared completely or it’s having a compatibility issues. Follow these steps to get avast! back working, and protecting your computer
If you’re still running on Windows 8, and you’re just about to upgrade to Windows 8.1 update your avast! antivirus first to avoid any future compatibility issues. Simplified steps are listed below or you can check our full guide ‘How to Update Your avast! Antivirus to 2014‘
This solution is however available only for the core products – avast! Free Antivirus, avast! Pro Antivirus, avast! Internet Security, and avast! Premier. If you’re running any of the avast! corporate products – avast! Endpoint Protection (Plus), avast! Endpoint Protection Suite (Plus), or avast! (File/Email) Server Protection, you have to wait for an official program update. According to Che Johnson at Official avast! Forum, Head of EDU Support at AVAST, such update should be available within a month or so.