Please clear these entries using the Hijackthis fix tool
C:\WINDOWS\System32\S24EvMon.exe
C:\WINDOWS\System32\RegSrvc.exe
C:\WINDOWS\System32\1XConfig.exe
F3 - REG:win.ini: load=C:\WINDOWS\system32\byxyy.exe
O2 - BHO: (no name) - {4F83066E-60A0-4E62-ABB6-9EB9975E74BC} - C:\WINDOWS\system32\byxyy.dll
O2 - BHO: {bd26969a-62b4-5438-8094-ee7a0367cb58} - {85bc7630-a7ee-4908-8345-4b26a96962db} - C:\WINDOWS\system32\ebeqjrtk.dll (file missing)
O2 - BHO: (no name) - {DD900A82-4DD3-417D-80DC-272DE892B9FB} - C:\WINDOWS\system32\qopno.dll (file missing)
O4 - HKLM\..\Run: [107ca3fe] rundll32.exe "C:\WINDOWS\system32\cehvhfcw.dll",b
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe (file missing)
O16 - DPF: {2DAD3559-2923-4935-AD49-B673D2539944} (IASRunner Class) -
https://www-307.ibm.com/pc/support/a...tent/AcpIR.cab
O20 - Winlogon Notify: ACNotify - ACNotify.dll (file missing)
and report on your progress.