You should be able to test for the so-called "clipboard virus" fairly easily... just copy a bitcoin address like this random one: 1Nr14VQZuYDVC1TmHUszDBdBhi39gAn4Cp
Try and paste it into a text editor or your webbrowser or whatever... and also try and paste it into coinbase like you are going to purchase coins just in case it is a coinbase specific hack as some chrome extension malware is known to target only bitcoin exchange websites... if it pastes a different address, then it is very likely your computer is infected.
If it ISN'T changing the address, then maybe you're not infected. When you were looking for your "previous" addresses... did you click "used" and see a warning dialog? If not, then you may not have actually seen ALL your addresses
![Wink](https://bitcointalk.org/Smileys/default/wink.gif)
First goto "Settings -> Security"... then click the "Manage" link under "My Bitcoin Wallet":
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Ftalkimg.com%2Fimages%2F2023%2F11%2F15%2Fz0E8W.png&t=665&c=dldJ2YGMDgkmtw)
Then scroll all the way down until you see the "Used Addresses" section, click the "Show" link:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Ftalkimg.com%2Fimages%2F2023%2F11%2F15%2Fz0sAJ.png&t=665&c=cKR2IqRj81AOaA)
You'll get a warning popup... click "OK":
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Ftalkimg.com%2Fimages%2F2023%2F11%2F15%2Fz03IC.png&t=665&c=EaIf0byMVIhxNg)
Now ALL your used addresses will show up:
![](https://ip.bitcointalk.org/?u=https%3A%2F%2Ftalkimg.com%2Fimages%2F2023%2F11%2F15%2Fz0k5b.png&t=665&c=6BEl1SnsxP96dQ)
If "1JqosveT62rZiPKDMZ49AjdqKRjMizSj8F" is NOT in this list... then you've somehow pasted in someone elses bitcoin address to Coinbase...
![Undecided](https://bitcointalk.org/Smileys/default/undecided.gif)
As for removal if your computer IS infected... maybe give
malwarebytes a shot?