What is Abk.bat?
Abk.bat is a virus
We cannot see the file unless we make all hidden files unhidden.
To enable the folder options >view>show hidden files and folders radiobutton
Goto HKlocal machine > software > microsoft > windows > current version > explorer > advanced > folder >hidden> showall > click on checkedvalue and make its value 1
Then untick the hide protected os files in folderoptions >view
Now the abk.bat files will be visible delete all of then including autorun.inf
Now Restart your computer and you are done.