How usefull is McAfee Security servises?

I have a new lap top and the McAFee pop-ups keep coming up all the time.It sometimes stalls the computer for a long time while it installs this and that.And it asks to update every other day.Is it viable to leave it on.What items are most important

1 viris scan

2 firewall

3 privisy service

4spam killer

???????????????/

It seems like it is always in the way or buging me

Thank You in advance

Tyson

How usefull is McAfee Security servises?norton 2008

avast! Antivirus is an anti-virus program distributed by ALWIL Software based in Prague, Czech Republic, first released in 1988. avast! is used globally and is available in 20 different languages. Since its release, avast! 4 Home has become one of the most popular full-featured freeware anti-virus applications for Microsoft Windows users, reaching over 3,000,000 downloads on Download.com [1]. It is free for home and non-commercial use so it is often compared with the free version of Grisoft's AVG Anti-Virus.

The software is aimed at preventing several types of threats, including those that are not technically computer viruses such as spyware, and can also make a Virus Recovery DataBase which is used to recover files when they are infected (instead of just deleting them). It can be downloaded with full text and voice translations to several languages and users can also customize its look to their taste with several skins.