I have been using SW2014 and have got it to SP5.0 for at least a year now, without any issues.
My parts and assemblies have started, just a day ago, to show lines and planes which are not part of the design.
These lines and planes are not shown if I create a drawing from the assembly.
I am running Win7 x64 on a Dell Precision M4800 with an ATI Firepro M5100. The drivers for this have not been updated since day 1 as I believe a stable system is best left alone.
I have re-installed SW with the same results.
Any hints would be really appreciated.