So in order for your Komplete 10 to work you already should have a previous Komplete version registered on your NI account (Not sure exactly which versions qualify but it will probably be at least Komplete 8 & 9 and possibly older versions too), if you dont own (or have registered on your NI account) any previous version the update will not work and you will get that error. 370 GB KOMPLETE 9 delivers 33 full-fledged instruments and effects, 12,000 inspiring sounds and over 120 GB of premium samples.
There are some details of what updates, upgrades and crossgrades are which you can find here: Theres no link for NI Komplete 10 neither Komplete 11 because it is new, theres only Komplete 9 links on the web.
The UPDATE serial number is to update your Komplete from a previous version you already own (and as such costs a lot less to purchase than buying a brand new full version), so if you have bought the UPDATE version you must already own and have registered on your account a previous KOMPLETE version (e.g KOMPLETE 9 etc.) If you bought the "UPDATE" that you mention, in order for the serial number to work you must already have a suitable "base product" on your account otherwise it will not work and you will get that error. Native Instruments Komplete 10 Ultimate Native Instruments Komplete 10 Ultimate is an all-in-one software bundle which includes Native Instruments complete line of samplers, software instruments, and digital effects. But after a while, if you're lucky someone will post a crack to Komplete 11. If you do not already have any products from Native Instruments or even a Native Instrument user account and wish to buy and use Komplete 10 you need to buy the "full version" this works and can be installed on its own. Komplete has never been so packed full of instruments and effects to make your mixes and tracks even better than they have been before. There's no link for NI Komplete 10 neither Komplete 11 because it is new, there's only Komplete 9 links on the web.