The weird otmaker is now installed again. It’s back in windows\system and also system startup. I’ve run Ad-Aware and Norton AntiVirus and nothing was found. This system normally runs in Windows 98SE, but booted into Windows XP and run the Microsoft Beta Adware, and again nothing found. It seems it might be connected to cfgwiz32.exe.

Manually removed cfgwiz32.exe and otmaker.