Windows 8 Booting Into Black Screen After Installing Avast Fix

                           If you had recently installed avast anti virus , it is likely to see a black screen after reboot.It is due to the 'Behavior Shield' that avast offers.Although this problem can be fixed by disabling this shield in the installation, there is an workaround this problem by only starting avast after the system services have begun.This post explains how to do it.If you are currently suffering from this problem, Do a system restore to the point before avast was installed.The help article is available here.Here's the workaround:

1.Open avast user interface

 3.Go to settings

 4.Select Troubleshooting

5.Select the check-box 'Load avast! services only after loading other system services' and choose ok

6.Restart your computer to see whether the problem is solved.

Note:You will have to do these steps immediately after avast installation without a reboot