2, caused by optimization software, need to reverse to solve, but do not know what optimization of things, difficult.
3, .vbs is an executable script file, itself is a registry pointing, then re-download the vbs file, into the pointing file location can be.
On the problem you described, it should belong to the optimization software, do not delete a registry item, we recommend that the online download hidefile.vbs, into the C:\Windows\, and then try!
I hope this helps!