An update to a number of Panda antivirus programs Wednesday mistakenly flagged core files as malware, putting them in quarantine. In doing so, the antivirus system ceased working.
First reported by The Register
, machines are left unstable, or unable to access the Internet.
Panda's free antivirus, retail 2015 service, and its enterprise cloud-based antimalware service are all affected. It's not clear how many machines are affected.
The company took to Twitter
to warn users: "Please, Don't reboot PCs. We'll keep you posted."
In an advisory
, Panda said the erroneous signature file was "repaired immediately," but warned under certain conditions it is possible for the "incident to persist."