This problem occur when i reformat computer and install KIS 2011 until now..
Dont tell me is OS problem?

Not yet..waiting my current license to expire 

updating seems ok to me..maybe depend on internet connection

i always seems to have this case. On-site or at my office also have this prob. Thats y i drop Kaspersky and sell Avira


which one? norton?

i reco Avira, u can get from me come to my shop in low yat


agreed. you can see the icon at tray bar blinking...err i mean popping up and down theres kis realtime scanning the program we just opening/using.
sometimes really annoying like need urgently reopening large artwork..in the same time it scanning my files..
what can do im using since kis 6..
but truly, it save many times for my pc especially sohanad trojan virus which my other cant handle it..at that time..salute.

waste time lah, scan and update really takes my time forever