Can't install IRST 11.6

[Elvicat]

So i forced an update of the chipset drivers and that's when stuff got weird, the sata driver reverted to the standard one in the chipset package and when i tried to reinstall intel's rst 11.6 driver it refuses and i get this message

"The setup program failed to install one or more device drivers.
Setup will now exit"

I've tried uninstalling also to no use, here's the funny part thought, i CAN install asus version of 11.1 but i'd like to get back to 11.6.

I use windows 7 sp1 x64 as my os.

Please help, i'm at my wits end with this one.

Been asking on multiple forums and sofar not one hint, this is annoying me to no end

[Elvicat]

So just after i write this i find a solution

Use the floppy version of the driver to force a driver install, works and after that i tried the normal installer and hello!? works also so i guess i got it straightend out atleast for now.

[LigH]

Failing installers are a mystery on its own.

I once had a PC where the installation of the FAR Manager failed. Even debug intallers did not report the exact reason, just building the internal script failed due to some missing prerequisite, but no clue which one.