I managed to install the 1.0.5 drivers on Win XP SP3 but it was a two-step manual process: using the included "dpinst" utility and Windows Hardware Wizard.
I opened a command window and went to "C:\Documents and Settings**\Local Settings\Application Data\Arduino15\packages\Intel\tools\arduino101load\1.6.4+1.18\drivers"
and ran:
dpinst-x86.exe /lm /sa /sw /se /f /path .
If the hardware Wizard comes up, have it "install from a specific location":
C:\Documents and Settings**\Local Settings\Application Data\Arduino15\packages\Intel\tools\arduino101load\1.6.4+1.18\drivers
Reset the board to make sure Windows loads the drivers for the Arduino/Genuino 101 devices - you may have to go through Hardware Wizard one more time.
Brian