Hortensius says Lenovo failed in due diligence. How, exactly? The two reasons people are upset about Superfish are that it breaks web security and injects ads into pages. Hortensius doesn't believe the former, and the latter is the entire purpose of the software. The only failure he could mean, taking him at his word, is in not anticipating the backlash, because as he describes it Superfish works as intended.
"It is very important to delete the certificate even though the application itself has been removed."
http://forums.lenovo.com/t5/Lenovo-P-Y-and-Z-series/Removal-...
Didn't seem that important earlier today: https://web.archive.org/web/20150219151726/http://forums.len...
"files in user directory will stay intact for the privacy reason. Registry entry and root certificate will remain as well. "