This is not the right way to create cold wallet.
You created wallet on internet connected computer, you created it on a computer whose hard drive is not fresh formatted, with plain OS and without any additional software installed.

This is the right, PARANOID way to do it:

1. Buy at least two new USB flash drives.
2. Format your computer's hard disk and install any OS you use.
3. Download MyEtherWallet and copy it on USB.
4. Create Ubuntu bootable USB(Or any other USB bootable OS)
5. Boot Ubuntu from USB.
6. DO NOT CONNECT TO THE INTERNET!
7. Create new wallet with MyEtherWallet
8. Copy to one or few(preferably) USBs your wallet file, 24 word seed, and your public address.
9. Write down you 24 word seed and your public address.
10. Store USBs and papers safely.
11. Format Ubuntu USB.
12. Send small amount to your cold wallet.
13. Confirm transaction and funds on your cold wallet on etherscan.io
14. Send as much funds as you want to your cold wallet.
15. Watch your wallet on etherscan.io