Posted 20 February 2007 - 04:05 AM
Hi there Christoph, welcome to the forums.
This problem is most likely one of two things, incorrect drivers for the mouse, or the mouse's hardware is actually failing itself. As this is a laptop, I am assuming that you are using a USB mouse. Click on start > control panel > and double click on "mouse". Click on the wheel tab, is everything greyed out, or are you able to change the options?
Then click on the hardware tab, and next to "device status:", let me know what it says. It should say something about the device working fine, if the mouse itself is being by Windows fine. Is this mouse plug and play, ie you don't need to install drivers for it? Most USB mouses are like this. If it isn't, did you install the drivers that came with the mouse? You could try to install them again, or use the Windows automatic method. Under the hardware tab, click on 'properties', click on the 'driver' tab, then click on "update driver".
If it's a plug and play mouse then you could always try it on another PC/Laptop and see if the scroll wheel works. If it doesn't work on another computer then you know that it is most likely a hardware fault with the mouse itself. I would recommend you purchase a USB mouse if you don't have one already; PS/2 mice can have problems on laptops because the touchpad is usually the default pointing device on the PS/2 bus. I've seen many problems with PS/2 mice on laptops in the past. USB mice fixed 95% of those problems.
Let me know how it goes, David