igor,
It looks I misunderstood Tech. I am sorry.
My question last too long....I should make cleayly again here:
Avast+Windows XP sp1+MS Outlook
If Avast! find some suspicious emails, it will display 3 small windows one by one.
In the first window with title "A virus was found", I clicked "Delete" button,
in the second window with title "Delete file(s)" and option "Delete file(s) permanently", I clicked "Delete" button,
in the third window with title "Suspicous Message!" and buttons "Delete", "Contimue" and "Block it", I clicked "Continue" or "Block it" ("Delete" button normally not available), then my Windows XP stopped for a few minutes....sometimes even need to switch off the power(cannot do restart).
After follow Vlk's instruction (set the sensitivity of the STANDARD SHIELD provider in avast to Normal), I got one suspicious email. This time only the first and the second Avast windows diaplayed (a little better) but the MS Outlook window became blank (white) until I finish a cup of tee...
There must be some reason making the conflict between Avast and MS Outlook.