When trying to install Choice CAD this error message appears "SHADOW caused a General Protection Fault in module ~TMP3BOB.EXE at 0002:0258". I've tried installing a few times without success although I noticed that the 'TMP3BOB.EXE' part changed each time but the '0002:0258' part stayed the same. I'm running WinXP Pro 2002 Service Pack 1. I've tried compatability mode and selective startup but again with no success. Any ideas?