I installed Avast! Home edition. I got license key, dont have any other antivirus program on my PC installed. Why cant i see blue a-ball, but only grey??? What did i do wrong?
Are you sure it’s really not blue? Is it spinning occasionally?
Please see e.g.
http://forum.avast.com/index.php?board=2;action=display;threadid=2507;start=msg17943
or
http://forum.avast.com/index.php?board=2;action=display;threadid=1248;start=msg6781
a-ball is spinning, yes, and it`s like something between blue and grey!
So no problem then - all is all right!
No need to be nervous 
Don’t you think your signature is a bit… i don’t know… too big? :o
Maybe you have a bit darker gamma/brightness/contrast settings on your monitor…
it is too big! on a dial up modem that would take at least 45secs- a min to load.