Using vista or windows 7 i usually do for the folders
program files
program files(x86)
users
go to security tab.
take ownership with inherit enabled as Everyone.
close tab
open again
delete all permission holders.
You get warning.
Add everyone as sole permission holder.
Give everyone all options
My Computer
Computer Manufacturer/Model Number
me and myself
OS
vista x64/ win 7 x64
CPU
phenom 9950 BE
Motherboard
ASUS M2A-VM HDMI
Memory
8 gb
Graphics Card(s)
nvidia gts 250
Sound Card
realtek HD onboard
Monitor(s) Displays
dual hd 19" tft
Screen Resolution
1440x900
Hard Drives
2 x 500 gb WDC
1 x 500 gb Seagate
1 x 1000 gb Seagate
1 80 gb raptor
1 usb 160 gb