Hola

-> Reinicia en Modo Seguro
-> Ejecuta el HijackThis, selecciona las siguientes entradas y dale en Fix checked.

R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\System32\mcicdb.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\System32\mcicdb.dll/sp.html (obfuscated)
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Bar = res://C:\WINDOWS\System32\mcicdb.dll/sp.html (obfuscated)
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = res://C:\WINDOWS\System32\mcicdb.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,Default_Search_URL = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\System32\mcicdb.dll/sp.html (obfuscated)
R1 - HKCU\Software\Microsoft\Internet Explorer\Search,CustomizeSearch = about:blank
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant = res://C:\WINDOWS\System32\mcicdb.dll/sp.html (obfuscated)
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch = about:blank
R1 - HKCU\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,HomeOldSP = about:blank

R3 - URLSearchHook: Search - {A376F031-E78D-4678-8646-B7BE60145A21} - C:\WINDOWS\System32\Q8093507.dll (file missing)
R3 - URLSearchHook: (no name) - {00000000-0000-0000-0000-000000000000} - (no file)
R3 - URLSearchHook: (no name) - {58AF46B8-B220-6477-30C1-CEEB25D2D0BB} - MON76234.dll (file missing)

O2 - BHO: (no name) - {0B4889E2-3E05-40CD-90F2-D378962FC40B} - C:\WINDOWS\System32\mcicdb.dll
O2 - BHO: (no name) - {0D42F7D9-A10D-41EE-ACAC-E07155F74681} - C:\WINDOWS\System32\mcicdb.dll

O3 - Toolbar: Search - {1604F9E8-9AB1-4CA9-84C8-0D801524E99E} - C:\WINDOWS\System32\Q8093507.dll (file missing)
O3 - Toolbar: (no name) - {00000000-0000-0000-0000-000000000000} - (no file)

O9 - Extra button: Search - {1604F9E8-9AB1-4CA9-84C8-0D801524E99E} - C:\WINDOWS\System32\Q8093507.dll (file missing)
O9 - Extra button: Related - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm
O9 - Extra 'Tools' menuitem: Show &Related Links - {c95fe080-8f5d-11d2-a20b-00aa003c157a} - C:\WINDOWS\web\related.htm

O15 - Trusted Zone: http://*.63.219.181.7

O16 - DPF: {11212111-2121-1311-1141-115611111222} - ms-its:mhtml:file://d: oo.mht!http://69.50.166.212/counter/new/x.chm::/update.exe

O18 - Filter: text/html - {B5D9A224-95F5-4769-8C9D-18322A7C06D2} - C:\WINDOWS\System32\mcicdb.dll
O18 - Filter: text/plain - {B5D9A224-95F5-4769-8C9D-18322A7C06D2} - C:\WINDOWS\System32\mcicdb.dll

-> Reinicia Normalmente
-> Actualiza tu sistema desde Windows Update
-> Toma otro log y deja lo aqui :dedosarri

Saludos