I got a free copy of Norton 360 to try out and not only did it make my system agonizingly slow, it also wiped out critical files for Windows XP such that my backup files were inaccessible. I had to completely reinstall the operating system from the original installation disk and reinstall all of my drivers. Then restore from my data backups. It took 6 hours to put everything back. Good thing I tried it first on a non-critical system.
Macfee is bloatware. When I tried it a number of years ago it copied hidden files to every single folder on my system. It was also incompatible with programming software because it kept tagging my new exes as viruses. Removing it was a pain because it left behind so many garbage files.
I’ve had the best luck with Trend Micro. It probably is not as good as it used to be several years ago, but at least it doesn’t slow down the system or destroy my files.
I’ve never tried Kapersky, but I’ve never heard anything particularly bad about it. I may try it.
I dumped Nortons years ago. It’s tentacles are invasive and brings down the machine performace. And just try getting rid of it!