DavidR,
Sorry but it is a show stopper for me.
At the cold boot this morning (after a chkdsk),
WinPatrol, Sandboxie and Avast! all were hung - but Online Armor seemed OK. Event viewer reported the aswan error, although I had disabled the rootkit startup scan.
Managed to disable Sandboxie at startup - after a forced shutdown, restart produced same problems.
Attempt to get to Avast settings produced a window reporting RPC Error, and FAQ button started IE which was then hung.
Managed to kill WinPatrol in Program Manager,
meanwhile (5mins) somehow Sandboxie and Avast had come good.
Cold restart - Avast Ok this time -
Tried "Delay loading Avast Services ..." - reboot - Avast not started.
"The AAVM subsystem reported a RPC Error"
All in all, most unsatisfactory, so its back to Avast! 4.7 for me
at least until Vlk can report success with the fix for the root kit scan.
very dissappointed
Maurice
P.S. On more thing to try - Disable Avast! Raw disk Access at Boot.