Hi,
Your avast! AntiVirus is Outdated. You need to run avast and update its engine and virus database.

DDS and Zoek logs doesn’t show malware traces or anything unusually.

We’ll re-launch Zoek this time with its definitions to see what will Zoek detect + when we are here, we will delete temp and junk files.

Re-run zoek as you did before with this script and post here fresh created zoek log.

autoclean;
c:\program files\GUT9460.tmp;f
emptyalltemp;

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I would like to re-check your system with powerfull Gmer AntiRootkit tool:

Please download GMER, AntiRootkit tool from the link below and save it to your Desktop:

Gmer download link
Note: file will be random named

Double-clicking to run GMER.

[*]Wait for initial scan to finish - if there is any query, click No;
[*]Click Scan button and wait until the full scan is complete;
[*]Click Save … - save the report to the Desktop (named Gmer1 );

[*]Right-click wherever in the GMER’s window and select Options > 3rd party - click the Scan button;
[*]Please wait until the full scan is complete;
[*]Click Save … button and save report to Desktop (named Gmer2 );
note: time scan for Gmer2 log may take some time

[*]Click the >>> and select Autostart card;
[*]After quick scan, click Copy button;
[*]Open notepad and Paste text. Save report to the Desktop (named Gmer3 )

Attach here all Gmer logreports. (Gmer1; Gmer2 and Gmer3)