avast creates the problem with windows explorer on my XP SP2 system

is anybody try avast IS 5.0 with windows xp sp2 ?

when i install avast IS 5.0, it causes some problem with my windows explorer (explorer.exe). when i try to open my explorer it will not display anything for sometime(means HANG ) and after that it will.

this problem occurs whenever i open my explorer and this problem is not generate with avast 4.8.

Do you have any previous AV or any AV alongside avast! ?