Windows 7: Can't install IRST 11.6

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.

Well look at that, i did find a solution and now i'm sharing it here for others in similair situations.

Get the f6flpy-x64 file or x86 for 32bit then do a manual install by directing windows to this exact file:
iaAHCIC.inf for ACPI
iaStorAC.inf for RAID
Only use the one you need not both.

This worked for me and after a reboot i again had 11.6 on my system.
Then i tried the normal intel installer and hello!? it also worked and reinstalled the bits i was missing.