2010 further problems

A couple of funny things happening in 2010. I can no longer use my delete button. This occurs with open gl mode on and off. I don't have the same problem in other programs like MS Word. Also, when I edit sketches and add relations, the sketches are sometimes not moving to the required position and becoming defined. This occurs for example when adding a vertical relation to a number of equispaced parallel lines.

Any one else having similar issues.

SolidworksAdministration