Voilà le rapport MBAM:
Malwarebytes Anti-Malware
http://www.malwarebytes.org
Scan Date: 11/08/2014
Scan Time: 10:14:00
Logfile: mbam.txt
Administrator: Yes
Version: 2.00.2.1012
Malware Database: v2014.08.11.01
Rootkit Database: v2014.08.04.01
License: Trial
Malware Protection: Enabled
Malicious Website Protection: Enabled
Self-protection: Disabled
OS: Windows 8.1
CPU: x64
File System: NTFS
User: Andréa
Scan Type: Threat Scan
Result: Completed
Objects Scanned: 299180
Time Elapsed: 42 min, 24 sec
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Disabled
Heuristics: Enabled
PUP: Enabled
PUM: Enabled
Processes: 0
(No malicious items detected)
Modules: 0
(No malicious items detected)
Registry Keys: 0
(No malicious items detected)
Registry Values: 0
(No malicious items detected)
Registry Data: 0
(No malicious items detected)
Folders: 0
(No malicious items detected)
Files: 2
PUP.Optional.Websteroids.A, C:\Users\Andréa\AppData\Local\Google\Chrome\User Data\Default\Local Storage\http_d.websteroidsapp.com_0.localstorage, Quarantined, [f7563d8891ea1a1c3a3bfafd936fa858],
PUP.Optional.Websteroids.A, C:\Users\Andréa\AppData\Local\Google\Chrome\User Data\Default\Local Storage\http_d.websteroidsapp.com_0.localstorage-journal, Quarantined, [e766279ec4b7a690ef86d6211ee4d828],
Physical Sectors: 0
(No malicious items detected)
(end)