Installation is not always easy

I let the upgrade running on my PC - first could not be loaded from Kaspersky server a newer version of the program, then the program could not be loaded (almost complete installation performed = serious mistake and everything uninstalled and then whoops funktionnierte the mouse no more.
Only an uninstaller (downloaded on another computer with Kaspersky) managed aid = the Kaspersky 2011 has completely uninstalled and then the mouse was again! Juhu!

Now the program Kaspersky 2012 funktionnierte properly and everything is fine.
== >> Recommendation 1. Kaspersky uninstall old 2 new Kaspersky play
Often confusing that is it when reinstalling = buy - the need to click to enter the authorization code. (It has already bought and wonders)