Can someone explain me, that in Windows (XP, Vista) when I insert a CD/DVD, the Explorer freezes for a couple of seconds and sometimes my mouse too? Maybe someone from the kernel or device driver guys knows the reason?
This has nothing to do with the kernel or drivers.
Windows Applications (this likely has nothing to do with Windows itself) have always been VERY WEAK in terms of asynchronious IO usage.
Just open a lage File in Notepad and it will hang until the file is opened. Or try some network access from explorer while the network is not yet available (e.g. pre DHCP) and it will hang until timeout and so on and so forth...