I’m running Windows XP home version. After installing Avast 4, when I logon I get an error message saying that ikernel.exe cannot be found. Any suggestions? ???
Hm, try uninstall and reinstall Avast. Ikernel.exe is a part of the installshild installer. Maybe there went something wrong while installing avast?
I doubt that will help, since avast doesn’t use InstallShield. Besides, I don’t know why an InstallShield kernel should be started on logon…
No, than that will not solve the problem, i think! 
@Wombat
Do you allready make a scan with Avast and does it detect a Virus?
BTW: Are there any references in the Registry regarding to the ikernel.exe?