Something is constantly processing in the background (plus graphic card deactivated?)

[Petra Volkhausen]

I updated Windows yesterday (had W7), and now it looks like something is being processed in the bg all the time ((the little blue processing icon appears next to the cursor every few seconds). I have a hard time typing offline (Word) and online, including here, and even when entering something into the start menu search bar. Typed words won't stay marked either. Videos stream fine.

I have a Lenovo Y570, NVIDIA graphic card - however, just found out that the latter is not active or so it seems. Control panel tells me the laptop is running an Intel HD graphic card. How is that possible...?
Note: I also downloaded a Kaspersky compatibility update.

This is a nightmare.