I had to reinstall my Windows Vista Operating System as I was infected with an invasive program that very well compromised my system. All my data files are intact and unharmed. However, after rinstalling the system and intalling all the updates I cannot find the Windows Aero Theme and can't figure out how to re-establish it. It is not in the display options. I am using a Lattitude D630. If anyone can help I would appreciate it as some programs now seem to crash my system that were installed previously.