Inactive Task manager won't open in Vista Home Premium

[iiiSAYRISiii]

Every time I try to open the Task Manger it says,"The Task Manager has been disabled by your administrator." I don't know how this happened, I am the only user on this computer and I didn't disable it. This is my HiJackThis log, Thanks.View attachment hijackthis.log

 

[Broni]

Please, complete all steps listed here: https://www.techspot.com/community/...lware-removal-preliminary-instructions.58138/