Well, I have made a tool which could enable your windows' Folder Options, TaskManager, Registry, System Properties and lots of other features which are sometimes disabled by viruses.
You need to edit registry(or can be done through command prompt as well). And if your registry editor has been disabled then you need to perform it through a visual basic script(vbs).
Since most of the viruses block taskmgr, regedit and cmd prompt, I figured out this software could help.