I've been using Kaspersky's products for quite a few years now, and had no problems until now. Installed this version on a desktop and a laptop, both running Windows 7 64 bit. It appeared to work OK on the laptop, but didn't automatically run at startup on the desktop, and had to be started manually. This appears to be a problem which has affected some users of Kaspersky Internet Security 2014, and at the time of writing this review they're still trying to resolve it. One suggestion was that the problem occurred on installing the 2014 version over the 2013 version, and to uninstall, reboot, do a clean install, then reboot again. I'd already tried this and it didn't work for me. Then I noticed when I was using the laptop that the Kaspersky icon appeared in the taskbar at startup, but disappeared several minutes later. This only happened once, but again it's a known problem with some people that Kaspersky are still trying to fix. At this point I gave up on this version of the program, as the last thing I want is to be surfing the Internet, happily thinking my security software is keeping my computer safe, when its stopped running. Luckily, I still had my installation disk for the 2013 version and reinstalled it. To sum up, I'm very disappointed with this program. I will check to see if Kaspersky have resolved the problems, and then maybe reinstall it, maybe just stay with the 2013 version as I know it works. But, next year I won't be automatically buying the next upgrade from Kaspersky.