RAM error message

[joep81096629]

Every time I try to edit a picture I receive two error messages. The  first one is that the layer is empty followed by their is not enough RAM. When I check the amount of available RAM their appears to be enough with 1.6GB available. How do I fix this?

[Peru Bob]

Here is the registry fix for that:

Error while accessing performance preferences - 'An integer between 96 and 8 is required.'