Unbekannter Virus im Browser

 ESETSmartInstaller@High as downloader log:
all ok
# product=EOS
# version=8
# OnlineScannerApp.exe=1.0.0.1
# OnlineScanner.ocx=1.0.0.7623
# api_version=3.0.2
# EOSSerial=69c4234dd9b7674fa305f8834fd570d4
# engine=23891
# end=finished
# remove_checked=false
# archives_checked=true
# unwanted_checked=true
# unsafe_checked=false
# antistealth_checked=true
# utc_time=2015-05-18 12:23:31
# local_time=2015-05-18 02:23:31 (+0100, Mitteleuropäische Sommerzeit)
# country="Germany"
# lang=1031
# osver=6.1.7601 NT Service Pack 1
# compatibility_mode_1=''
# compatibility_mode=5893 16776574 100 94 231256 183538461 0 0
# scanned=216171
# found=0
# cleaned=0
# scan_time=3692
         

  Results of screen317's Security Check version 1.001  
 Windows 7 Service Pack 1 x64 (UAC is enabled)  
 Internet Explorer 11  
``````````````Antivirus/Firewall Check:`````````````` 
Avira Antivirus   
 Antivirus up to date!  (On Access scanning disabled!) 
`````````Anti-malware/Other Utilities Check:````````` 
 Adobe Flash Player 10 Flash Player out of Date! 
 Adobe Flash Player 17.0.0.169  
 Adobe Reader 9 Adobe Reader out of Date! 
 Mozilla Firefox (38.0.1) 
````````Process Check: objlist.exe by Laurent````````  
 Malwarebytes Anti-Malware mbamservice.exe  
 Malwarebytes Anti-Malware mbam.exe  
 Avira Antivir avgnt.exe 
 Avira Antivir avguard.exe 
 Avira Antivirus sched.exe  
 Avira Antivirus avshadow.exe  
 Malwarebytes Anti-Malware mbamscheduler.exe   
`````````````````System Health check````````````````` 
 Total Fragmentation on Drive C:  
````````````````````End of Log``````````````````````