Tech this isn't an integration of antivirus and anti-spyware, it is just Ewido with different clothes and some tweaking, which may be what is causing me grief, see below.
Well AVG-anti-spyware is no more on my system and I'm back to ewido 4.0, currently downloading updated signatures, quite a lot since I saved the ewido set-up file I downloaded in July.
After suffering my 4 replicable system lock-up it is history. Before any other security scan I pause standard shield and start the other scanner. I did a full scan which took about twice the time of the Quick scan, in line with what others have experienced. Once completed I closed the window using the X (top right) and tried to resume avast, no response, nothing else would work either, mouse pointer free to move and click to its hearts content but no action. No way to get Task manager open. So had to do a 5 second press of power button to try and get as tidy a shut-down as possible, followed by a power up.
I tried this again following the same sequence but this time I opened Task manager to have it ready and see what was going on. Even when you close the avgas window the avgas.exe is still running, I ended the process in task manager and tried to resume standard shield and the same problem, everything locked-up and had to do the 5 second Power button trick again, this time Windows wanted to check the disks because of the irregular shut-down.
I had suffered these lock-ups before but hadn't taken much notice of the sequence of things, so I took the time to get it recorded in case anyone else is suffering this problem.
But, for me AVGAS is history and Ewido is back until such time as I can't get updates for it and then, a-squared perhaps, we will see.