But you already exposed the cold-storage private key to an online machine for nothing.
The OS is safe at least.
I'm not sure the OP did expose the key on an online machine. It appears he may have been successful in creating the Imported wallet, but then proceeded to attempt to sweep it afterwards. If he imported on an off-line machine he wouldn't see the funds, and maybe that's why he attempted to sweep it... Just a thought, I can't be certain without more information.
He did.
If he swept that on an offline machine, he
'll get would have got a different error; specifically: "
cannot Establish a connection... gave up."
But in the OP, he mentioned that he got: "
No inputs found".