If you don’t sign in, Google will track your searches via the computer’s IP address. The only way to clear your personal history is by signing in.
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Wonder how they do that when your IP changes every time you log on. Good luck goo gle. Seriously, it’s not rocket science to circumvent goo gle.
“...your IP changes every time you log on.”
Is that true? Haven’t needed tech support in a long time now, thank GOD, but when I did more frequently, my IP was the same (it seemed) from visit to visit.