Is UAC enabled or disabled?..If it is enabled, try disabling it.. To disable
it, press WinKey+R then type "msconfig" w/out quotes, go to the tools tab
highlight Disable UAC and then click Lanuch. A command prompt window will
open and let you know if it was disabled successfully. Restart the PC and
then try the install again.
Try right clicking on the icon, selecting properties, open the compatibility
tab, and selecting "run as administrator" on the installer and on the
shortcut to the program. Helps on most programs.