Just wanted to share some information, after April 2017 version of Avast was installed, Ms VirtualPC started giving error (192) just before loading into windows, was able to diagnose and resolve this problem by opening "Avast" then going to "Settings (bottom left corner)" then selecting "Troubleshooting" section and un-checking "Enable hardware-assisted virtualization", ok to confirm, then rebooting computer, once that was done virtual pc was able to load fine as usual.