Every time I try to install Kaspersky, It says that I should remove AVG first. I removed AVG and restarted my computer but it still says that I should remove AVG. I checked the programs installed on this computer and there is really no AVG installed.

Whenever you are going to install a program, or do system updates, that you know are safe, you should always disable your antivirus software.
Anti-Virus software can really mess up an install by preventing certain parts of the install process from completing, sometimes without alerting the user.
System updates and program installs are similar in methedology to malware processes and trojan attacks, which is the reason this is the case.
Cheers,

Im deciding to buy one of this things but i want it to have one these characteristics
1. Fast antivirus scan
2.Strong Firewall
3.Low on resources like doesn’t make the computer make a lot of noice etc.
Im thinking of nod and kaspersky any recommendations and why.

Both are good. I lean more toward Kaspersky, but not by much. I generally turn off my firewall (it interferes with file transfers on my network), but I am behind a router that has a built-in firewall.

I am not fully confirm ; kaspersky is working properly or not.I mean some webpages like adultfinder.com etc automatically opens whenever I serf the net.how can I stop that?

Please answer like a definite answer not like giving options! thanks for the help!