Since installing the latest patch I have to apply unlocking code everytime I go to use it.Once I have unlocked it seems OK, and can exit and re start again, but when I restart PC it requires unlocking code again.Any ideas?

Check to see if your LFS folder is set as read only. Right click on the LFS folder, go to Properties and look to see what the "Read Only" check box says. If it's either got a tick or a square in it change that to empty.

Not whole LFS folder. Check write permissions on data\misc and cfg.txt.

Also, after unlocking LFS, don't hibernate before you restart at least once. After restart, you can hibernate safely.

Thanks, that appears to have fixed it, never done that before though?