DLL Error When Running Blender 2.69

Thanks for your help with this problem. I’m having trouble installing and running Blender 2.69. Tried both EXE and ZIP downloads without success. First, some system info: I’m running Windows 7 Home Premium with Service Pack 1 on an HP Pavilion dv7 notebook, which has two graphics processors. Here’s what Device Manager says under “Display adapters”:

Mobile Intel HD Graphics, and
Radeon HD 6490M

The following error appears when trying to run Blender after extracting the zip file:

LoadLibrary failed with error 1114: A dynamic link library (DLL) initialization routine failed.

I am running Blender.exe in the folder I originally extracted it to.

I appreciate any guidance you can offer. Thanks again.