What is a "video controller"?
Do you mean you need drivers for your video device on some computer?
Why do you think you need either (what is the problem)?
If you do this somebody (most likely a non Microsoft person) might be able to help find what you need:
Is this a new Windows installation?
What is your system make and model?
If a Dell what is the Service Tag number?
If an HP what is the serial number?
Do this so we can see what you have:
Click the Start button/orb in the lower-left corner of your screen. Or, press the Windows logo key on your keyboard.
In the search box enter:
msinfo32
Select/click msinfo32.exe and the System Information dialog box will open.
Click on System Summary, click Edit, Select All (Ctrl-A), Copy (Ctrl-C) and then paste (Ctrl-V) the information back here in your next reply.
For video driver information, expand the Components, click Display, click Edit, Select All (Ctrl-A), Copy (Ctrl-C) and then paste (Ctrl-V) the information back here.
There will be some personal information (like System Name and User Name), and whatever appears to be private information to you, just delete it from the pasted information.