Windows7, Fehlermeldung von Avast: Rootkit gefunden

Fix result of Farbar Recovery Tool (FRST written by Farbar) (x64) Version: 05-02-2015
Ran by Kathrin at 2015-02-06 15:00:25 Run:2
Running from C:\Users\Kathrin\Downloads
Loaded Profiles: Kathrin (Available profiles: Kathrin)
Boot Mode: Normal
==============================================

Content of fixlist:
*****************
HKLM-x32\...\Run: [] => [X] 
HKLM\SOFTWARE\Policies\Microsoft\Internet Explorer: Policy restriction <======= ATTENTION
HKU\S-1-5-21-929969998-3954605437-2991725684-1000\SOFTWARE\Policies\Microsoft\Internet Explorer: Policy restriction <======= ATTENTION

Task: {5CC114F7-EB77-4F3C-B7F5-DCC470EFAE01} - System32\Tasks\Scheduled Update for Ask Toolbar => C:\Program Files (x86)\Ask.com\UpdateTask.exe <==== 
ATTENTION

Task: {9714E4BB-6446-4670-89ED-ADA5187F4289} - System32\Tasks\DigitalSite => C:\Users\Kathrin\AppData\Roaming\DIGITA~1\UPDATE~1\UPDATE~1.EXE <====
ATTENTION  

Task: C:\Windows\Tasks\DigitalSite.job => C:\Users\Kathrin\AppData\Roaming\DIGITA~1\UPDATE~1\UPDATE~1.EXE <==== ATTENTION 
Emptytemp:
*****************

HKLM\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\\ => value deleted successfully.
HKLM\SOFTWARE\Policies\Microsoft\Internet Explorer => Key not found. 
"HKU\S-1-5-21-929969998-3954605437-2991725684-1000\SOFTWARE\Policies\Microsoft\Internet Explorer" => Key deleted successfully.
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{5CC114F7-EB77-4F3C-B7F5-DCC470EFAE01} => Key not found. 
C:\Windows\System32\Tasks\Scheduled Update for Ask Toolbar not found.
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\Scheduled Update for Ask Toolbar => Key not found. 
ATTENTION => Error: No automatic fix found for this entry.
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tasks\{9714E4BB-6446-4670-89ED-ADA5187F4289} => Key not found. 
C:\Windows\System32\Tasks\DigitalSite not found.
HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Schedule\TaskCache\Tree\DigitalSite => Key not found. 
ATTENTION => Error: No automatic fix found for this entry.
C:\Windows\Tasks\DigitalSite.job not found.
EmptyTemp: => Removed 33.9 MB temporary data.


The system needed a reboot. 

==== End of Fixlog 15:00:31 ====