Cursor shadows

We're having a company wide problem with stock Dell 390 computers.
When creating a line in the sketch editor, "shadows" of the line
follow the cursor around until everything in the sketch is obscured
with these shadows. It is very irritating, but seems to clear up
after an hour or so. Any idea how to stop it?
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I am only guessing here,
1, Check the, "leave mouse pointer trail", in enabled in the mouse settings.
2, Try running SW in software openGL to see if it is your graphic card.
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