I have Lenovo Ideapad with Windows 8.1
After I log in, I receive a black screen with mouse pointer.
I called Lenovo to figure out how to get to Safe Mode (Shift + Restart on Win 8)
They remoted in, looked at processes in Tak Manager and stopped RunOnce - I then got the usual desktop back.
They looked at the RunOnce file in C:\Windows\System32.
They ffel something is wrong with the file at it should be around 50 KB and is only 42 KB.
Where can I download a safe version of the file to reinstall to see if it takes care of the issue I am having?