Close yahoo account and wipe data clean
Yahoo announced important security information for yahoo users that it has discovered an additional 1 billion user accounts were compromised in electronic attacks dating back to 2013.
One billion? I think most of them just have yahoo account years ago and just leave it there without updating, but now you may not ignore this account, it's safer to terminate it.
click this link and terminate yahoo account, once clicked YES to terminate this account, you cannot access to it anymore, and it will take approximately 90 days for the team to complete the process. So it's important to transfer files or emails which are meaning for you.
But is that enough?
Run a scan on the disk again, check each partition if malware or spyware exists, use Window + F to find files with file extension ".msg", you'll be surprised. Click on each of them to see if they're saved by yourself, if not, press Shift+ Delete to erase them. Now, we just deleted the reference to those files, not wiped them clean, traces are still out there show as "free space" for the coming files, how to wipe these free space clean? We could use third party data-destruction software Macrorit Data Wiper.
Steps to wipe free space clean in Data Wiper:
- Get portable data erase software Macrorit Data Wiper from the download page
- Run it and click the partition contains the file you just deleted
- Click Wipe free space on the top of the interface, and choose wiping methods
- Click Wipe Now and key in "WIPE" to erase free space in that partition.
This operation in Data Wiper also applies to situation when you found suspicious programs or apps installed on this disk without notice. And it's also an ultimate solution to wipe the trace of any data: photos, documents, movies and other personal files you stored on the disk.