*if you have subscription left on your 2011 KIS then you can download this upgrade to the latest version via a download from the official Kasperksy website and keep the remainder of your subscription in tact. As far as I'm aware Kasperksy are the only anti virus company that lets you do this (you'd normally have to buy the latest program).
**Or you can buy KIS 2011 now from Amazon for around £19.99 which is half the price of 2012 and then still do the upgrade to 2012 online to get the latest version**
It is really easy to do, I did it last night and set it all up in less than an hour. The new interface looks slightly cleaner than the 2011 version and now has an extra cloud based protection, for a more instantaneous protection from new virus's.
All the usual features are here, including the useful onscreen keyboard to keep things a bit more secure when entering passwords (ie protection from keyloggers) and a safe run mode for your Internet Browser too for an extra level of security.
Being Internet Security (rather than Anti Virus only), you also get the Firewall, anti virus, anti spam etc. They also do a useful "Vulnerabilities Scan" which lets you know if any of your programs, ie Firefox, Java, Flash etc need upgrading.
As always, its not free, you can get some decent packages free i know, but Kasperksy has that trusted nature about it, it has always been a very solid internet security package. I've used KIS 2010, 2011 and now 2012 and love it, it keeps everything out without slowing the system down noticeably.
If you don't want to risk your laptop getting a virus and going kaput then Kasperksy is an excellent choice.