The message is nothing to be worried about given this card is in use.
The hanging however is common when you add such to a small machine. I can't find the make, model or details but 32 bit Windows 7 on 2GB RAM would and could cause long pauses. It's a nice budget machine so we expect a budget performance.
For now, try turning off FLASH HARDWARE ACCELERATION (see google) and leave the case cover off to sniff out if this is a heat issue.
Bob
Hi,
I have installed sony vegas pro 11 and been working for some time. Recently I have added ASUS 210Silent ( GE Force Physx HDMI) 1 GB DDR3 Graphics card. All went well for one month. Now, whenever I try to import video clips into vegas pro 11, I am unable to import the clips. The vegas pro hangs up and I get the following message every time.
"Windows has detected your computer's performance is slow. This could be because there are not enough sourcesto run the windows Aero colour scheme. To improve performance, try changing the color scheme to Windows 7 Basic"
Not only vegas pro, but the entire system hangs up including internet.
The following is my PC configuration
OS Windows 7 Ultimate 32 bits OS
Pentium (R) Dual core CPU E 5400 @ 2.70 GHZ
Ram 2.00 GB
No Pen or Touch input for the display
Hard disc Nearly 466 GB
System Rating 4.3 Windows Experience Index
Pls guide me what should I do to restore normal and speedy working of Vegas Pro 11
Thanking you,
Sridhar,

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