Programs crashing

Multiple programs on my computer (Vista Home Premium) are crashing. Windows
DVD Maker, The Sims 2, and all Macromedia programs. Digital art programs such
as DAZ Studio still work fine. The computer is nearly a year old and beyond
some more common, minor problems that are associated with Vista, I haven't
had this kind of trouble. Here is a copy of the Windows DVD Maker problem
report:

Windows DVD Maker
Problem Event Name: APPCRASH
Application Name: DVDMaker.exe
Application Version: 6.0.6000.16386
Application Timestamp: 4549b5b0
Fault Module Name: xvidcore.dll
Fault Module Version: 0.0.0.0
Fault Module Timestamp: 43a00b96
Exception Code: c0000094
Exception Offset: 0006446e
OS Version: 6.0.6000.2.0.0.768.3
Locale ID: 1033
Additional Information 1: 8d13
Additional Information 2: cdca9b1d21d12b77d84f02df48e34311
Additional Information 3: 8d13
Additional Information 4: cdca9b1d21d12b77d84f02df48e34311