Q: Windows 7, vga graphics adapter problem.

Please post the screen shot of the error message, if possible.

This is a bit strange. The iMac has Intel or nVidia (iMac (21.5-inch, Late 2013) - Technical Specifications or iMac (27-inch, Late 2013) - Technical Specifications ) but a Standard VGA implies that you do not have the GPU drivers correctly installed. Can you post a screen shot of Device Manager -> Display Adapter tree expanded? What is the current driver version installed? What is the exact GPU model you have in your Mac?

You are missing the GPU driver.

You have the correct BC5 driver package according to Boot Camp Support Software 5.1.5640

Post Date: Feb 11, 2014

File Size: 925.6 MB

System Requirements

• MacBook Air (11-inch & 13-inch, Early 2014)
• MacBook Pro (Retina, 13-inch & 15-inch, Mid 2014)
• MacBook Air (11-inch & 13-inch, Mid 2013)
• MacBook Pro (Retina, 13-inch & 15-inch, Late 2013)
• Mac Pro (Late 2013)
• iMac (21.5-inch & 27-inch, Late 2013)
• Windows 7, Windows 8, and Windows 8.1, 64 bit

1. Can you If you don't see some features of your Mac in Windows - Apple Support and Repair your BC drivers?

2. Is/was Windows installed using EFI Boot?

If you already have the 5.1.5640 W7 version, your do not need to download it again. Try the Repair drivers first and check Device Manager and verify that you see the Intel GPU.

EFI Boot can run into issues, but we can leave it for the time being.

Check on the Intel Website for newer drivers. Be careful before you apply them. Create a Windows System Restore point, before you update the drivers.

Also, run msinfo32 and check the installation mode of Windows. Here is an example on W8.1/Bootcamp on a 2012 MBP.

Excellent. Please backup Windows and create a System Restore point. I would also recommend screening all Drivers updates that Windows Update applies. I usually use Notifications and Download only, but not Automatic Updates.