WoodyZ was right: I removed the outdated VMplayer (# vmware-installer -u vmware-player), installed VMware-Player-6.0.1-1379776.i386.bundle, and REINSTALLED Windows 7. My old Win7 virtual machine was created by a former VMplayer and ran fine on it. But it core dumps on the recent vmplayer.
yum-complete-transaction still reports challenges. But vmplayer starts, Win7 (MS Windows 7 Pro) starts, and Internet Explorer 8 runs fine in it. This is all I need: display MS-format webcasts Firefox cannot display.
