on board VGA and DVI - when plug in USB startech adapter the DVI quits working

I am replacing a PC with a new HP PC onboard Intel(R) HD graphics card w/both dvi and vga ports.  Both monitors will work.  I also have a USB2VBAE2 adapter from Startech that I was using on my previous PC to have 3 monitors.  I have installed all sorts of ways, I have confirmed on-board is current driver.  Everytime I activate the USB monitor - the DVI monitor says no signal and is no longer available.  I have tried tech support with Startech and have not gotten a solution yet.  

On my old PC - this adapter installation created an additional display adapter that was viewable via the device manager.  on the new PC - nothing.  

I'm ready to scrap the new PC and give it to someone else who doesn't use 3 monitors.  

All installs are as local admin.  Any thoughts?
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I had this problem with a HP Elitebook.  Its the display adapters and a filter driver.

1. upgrade the video driver to the latest one FROM INTEL

2. Install this for the USB Adapter, while it is plugged in:


3. reboot

4. USE THE INTEL tray icon to configure your monitors, NOT the Windows System Screen Resolution built-in utility.
Is the new PC the same OS as the old PC? I take it you've tried to extend your displays or set Graphics Profiles ect. What OS are you using?
jenitAuthor Commented:
I will try wyo's ideas in the am. Both are win 7 pro
jenitAuthor Commented:
the other drivers did not solve the problem.   I am closing the question as this machine is irritating me.  I am going to give it to a different user who also needs a new machine.  She only uses 2 monitors.  

thanks for your help.

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jenitAuthor Commented:
closing the question
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