Resident scanner doesnot work.

Hi all.
I m new to this forum. I need a little help. I have an avast 4.8 home edition. My resident scanner always remains disabled, no matter how many times i enable it and set it to high. The icon is also not displayed in the system tray.
I have uninstalled it many times and installed by downloading new installation file but it didn,t help. Please somebody help.

Thanks in advance.

-= Do you have any other antivirus(es) installed before avast…? If yes, it would be much better to use a removal tool / registry cleaner of the said AV…

I have answered your ‘other’ topic on this problem, http://forum.avast.com/index.php?topic=45785.0. Please don’t post multiple topics for the same question, it just duplicates the effort for those trying to help.