I have just spent the last hour putting right my PC after foolishly installing Kapersky 2010 Free Trial.......
I have always used AVG and ZA to protect me from nasties, but having heard so many good reviews about Kap. I decided to give it a go for a month, after all it wasn't going to cost anything so nothing to lose...BIG MISTAKE.
Having deleted AVG and ZA as per recommendation I then followed the instructions to the letter only to find that once installation was complete, although my PC booted up ok,I could not access either the internet or any other apps and could only remove it from my PC via safe mode.
Is this because i was using the "free" version because to be honest, just after it installed it was saying "at risk" because ONLY the free version was being used and I was recommended to update to full version.
I have always been of the "if it ain't broke don't mend brigade" so why I decided to give this a go, God only knows, but never again, I will stick with the tried and tested in future.
You should have no trouble with KIS trial, you say "Having deleted AVG and ZA as per recommendation " I suspect that you have not cleared everything out of the registry. How did you "delete" AVG & ZA ?
Funny that, I've got Kaspersky 2010 3 user and I've had very few problems. I had Kaspersky 7 beforehand which was very good. Kaspersky also bangs out trojans and other malicious files. The only thing I would knock Kaspersky 2010 for would be the instruction manual is quite undescriptive. I have heard that free internet anti-virus security is quite poor. Plus with purchasing the disk, you will always have that if things go pear shaped. Most magazine's promise useful stuff on their discs but in reality it is a gimmic.