I'm using AVAST Free and I've also tried installing Malwarebytes PRO. I ran a scan with MB Pro and it didn't turn out anything dangerous. Already used CCleaner, but to no use.
Might this Hijackthis log be of any use ?
Logfile of Trend Micro HijackThis v2.0.4
Scan saved at 16:42:48, on 15.08.2013
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v6.00 SP3 (6.00.2900.5512)
Boot mode: Normal
Running processes:
C:\WINDOWS\System32\smss.exe
C:\WINDOWS\system32\winlogon.exe
C:\WINDOWS\system32\services.exe
C:\WINDOWS\system32\lsass.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\System32\svchost.exe
C:\WINDOWS\system32\svchost.exe
C:\WINDOWS\system32\Ati2evxx.exe
C:\WINDOWS\Explorer.EXE
C:\Program Files\AVAST Software\Avast\AvastSvc.exe
C:\WINDOWS\system32\spoolsv.exe
C:\WINDOWS\system32\RunDll32.exe
C:\Program Files\AVAST Software\Avast\avastUI.exe
C:\Program Files\Common Files\Java\Java Update\jusched.exe
C:\WINDOWS\system32\ctfmon.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\MOM.exe
C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\ccc.exe
C:\Program Files\Java\jre7\bin\jqs.exe
C:\WINDOWS\system32\svchost.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Documents and Settings\Administrator\Local Settings\Application Data\Google\Chrome\Application\chrome.exe
C:\Program Files\Speccy\Speccy.exe
D:\Programe\HijackThis.exe
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar =
http://www.google.ro/ie_rsearch.html
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page =
http://www.google.ro
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page =
http://www.google.ro
R1 - HKCU\Software\Microsoft\Windows\CurrentVersion\Internet Settings,ProxyOverride = *.local
O2 - BHO: Java(tm) Plug-In SSV Helper - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre7\bin\ssv.dll
O2 - BHO: Java(tm) Plug-In 2 SSV Helper - {DBC80044-A445-435b-BC74-9C25C1C588A9} - C:\Program Files\Java\jre7\bin\jp2ssv.dll
O4 - HKLM\..\Run: [KernelFaultCheck] %systemroot%\system32\dumprep 0 -k
O4 - HKLM\..\Run: [Cmaudio] RunDll32 cmicnfg.cpl,CMICtrlWnd
O4 - HKLM\..\Run: [avast] "C:\Program Files\AVAST Software\Avast\avastUI.exe" /nogui
O4 - HKLM\..\Run: [StartCCC] "C:\Program Files\ATI Technologies\ATI.ACE\Core-Static\CLIStart.exe" MSRun
O4 - HKLM\..\Run: [SunJavaUpdateSched] "C:\Program Files\Common Files\Java\Java Update\jusched.exe"
O4 - HKCU\..\Run: [ctfmon.exe] C:\WINDOWS\system32\ctfmon.exe
O6 - HKLM\Software\Policies\Microsoft\Internet Explorer\Toolbars\Restrictions present
O8 - Extra context menu item: E&xport to Microsoft Excel - res://C:\PROGRA~1\MICROS~1\Office14\EXCEL.EXE/3000
O8 - Extra context menu item: E&xport în Microsoft Excel - res://C:\PROGRA~1\MICROS~1\OFFICE11\EXCEL.EXE/3000
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\WINDOWS\Network Diagnostic\xpnetdiag.exe
O10 - Broken Internet access because of LSP provider 'c:\program files\bonjour\mdnsnsp.dll' missing
O17 - HKLM\System\CCS\Services\Tcpip\..\{9E60334F-E82B-4E22-A320-9B357C87EC1B}: NameServer = 193.19.192.15,193.19.192.16
O22 - SharedTaskScheduler: Browseui preloader - {438755C2-A8BA-11D1-B96B-00A0C90312E1} - C:\WINDOWS\system32\browseui.dll
O22 - SharedTaskScheduler: Component Categories cache daemon - {8C7461EF-2B13-11d2-BE35-3078302C2030} - C:\WINDOWS\system32\browseui.dll
O23 - Service: Ati HotKey Poller - ATI Technologies Inc. - C:\WINDOWS\system32\Ati2evxx.exe
O23 - Service: avast! Antivirus - AVAST Software - C:\Program Files\AVAST Software\Avast\AvastSvc.exe
O23 - Service: InstallDriver Table Manager (IDriverT) - Macrovision Corporation - C:\Program Files\Common Files\InstallShield\Driver\11\Intel 32\IDriverT.exe
O23 - Service: Java Quick Starter (JavaQuickStarterService) - Oracle Corporation - C:\Program Files\Java\jre7\bin\jqs.exe
O23 - Service: Mozilla Maintenance Service (MozillaMaintenance) - Mozilla Foundation - C:\Program Files\Mozilla Maintenance Service\maintenanceservice.exe
O23 - Service: Skype Updater (SkypeUpdate) - Skype Technologies - C:\Program Files\Skype\Updater\Updater.exe
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End of file - 4548 bytes