Tack sÃ¥ mycket! (eller hur sÃ¤ger man det pÃ¥ norska? lol)
I'll certainly give that a go, although I never bothered with the laptop (it's new haswell based) that much since it has a HDD and the only thing keeping me from using XP on it (as I do on all my other PC's) is the WLAN card which doesn't have XP drivers (everything else does, sort of anyway). So I'll probably buy another WLAN card/chip and install XP64 which I haven't found a working haswell AHCI driver for (and obviously XP doesn't have one built-in). Intel's one crashes no matter how you install it (even with F6 method during XP install).
It's verified to be an issue with the driver itself, and I have found a custom made AHCI driver on some forum that's supposed to allow for AHCI on XP and XP64 for Ivy Bridge and Haswell, not much use on the laptop but I bought a Crucial MX100 256gb SSD for my main PC (Ivy Bridge) in 2014 and that could certainly benefit from NCQ.
@kyrcy, I'm glad you got your problem fixed.