Gmer is a well-known rootkit detector tool. Bitdefender marked an older version from 2013 as malicious and Bitdefender blocked Chrome from downloading an update.
Is Gmer really malicious?
EDITED: File(s) and/or URL(s) removed by @Gjoksi
"Posting malware samples and /or URLs is not allowed in the community! Do not post direct links to any executable files, malicious/suspicious software or websites in threads, comments or private messages, even if you think the software or site is clean and incorrectly detected by Bitdefender."