Can we install two different anti virus softwares on same computer?

September 23, 2008 11:30am CST
I have Norton anti virus 2007 already installed as an offer on my laptop when I bought it. Now the subscription has expired and I dont want to have a paid renewal for that, instead thinking to go for free 90 trials of McAfee or some other ones. Now my question is can I install McAfee or any other anti virus software without removing existing Norton anti virus. If its not a problem, will there be any problem having two anti virus softwares on computers. Also please let me know which trail versions are best if the McAfee that I chose is not okay for you. Thanks in advance