This seems to get worse each time I use the scroll bar or cursor to relocate on the page.
The noise started happening a couple of weeks after downloading an ATi Graphics card, to use with some Lego software. It seems to be getting increasingly difficult to read the screen. Didn't happen for a couple of weeks after downloading graphics software and have since unistalled it (no difference)
Is this a virus, or a problem you recognise?
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So what exactly is wrong? It seems like you have dual screen enabled. Try mousing beyond the edge of you PC screen, the cursor may move onto the TV. If you don't want dual screen, there's an option for clone display instead.
If you understand the components of a computer pretty well, open the case and remove and reseat the graphics card into the slot.
Does it seem to only do it after so long, for example turn the computer of for a few hours, and it wont happen when its first turned on, but then a few moments later it starts after its warmed up? If this does not resolve the issue, you may be experiencing graphic artifacts which can occur when a gpu is overheating due to a poor cooler. Check to make sure the heatsink is touching the gpu.
It sounds like you need to upgrade your video driver. This is a common problem when computers run off the default Windows driver. Probably best to go to the IBM website and get the latest video driver for your model and follow their instructions.
I would not recommend removing the ATI driver, because this might cause some instability. It seems like your card might be the problem. Try calling ATI and see what they say, you might be able to RMA. Last time I RMA'd it costed me 10 bucks too.