Your English is pretty good, no problems. I'm not a native speaker either.

Your problem seems to be something relating to Nvidia. I'm not that good, OK, I admit I'm bad with issues that are not malware-related.

But a bit of research indicated that your problem can occur after you install Creative Audigy cards/software. Do you have any of each in your system?

Chiaz, I told you, Pig Latin is not a recognized foreign language.

Overmars, from reading chaiz response, I think you might need a driver update.
If you have a Creative Audigy card/software, then this might help.
Click on this link - Customer Support: Downloads
Then, click on AutoUpdate

You might also need other drivers. I assume you are using Windows XP.
First, check your system drivers by clicking on Start>Windows(Microsoft) Update. Click for Custom updates. Install any indicated drivers. Second, recommend you click on DriverAgent.com Fix Your Driver Problems Instantly with Driver Agent and check the status of your non-system drivers. Let us know any indicated driver that you need.

Good Luck...