Hi, I'm trying to install Boris FX RED 5 trial on Windows 7 64bit. Each time I try to install it I get the following error message: 'Error 1926. Could not set security for file C:\Windows\. Error: 0. Verify that you have sufficient privilages to modify the security permisions for this file.' I contacted Boris FX who told me it's a Win 7 error. I have an administrators account and UAC is set to off. I've never encountered this installation error before since I installed Win 7 about a year ago. I can't find an '. Error:0.' file or folder. I tried to change permissions on the 'Windows' folder but this wouldn't work. I completely have no idea how to solve this problem. Can anyone help please?