A new Windows hole was recently discovered that allows users with restricted access to escalate their privileges to system level. That means that an ordinary user exploiting this hole can gain admin access to your system.
According to reports, this hole is present in all versions of Windows, from Windows NT 3.1 up to Windows 7! It took 17 years for this hole to be discovered.
There’s no patch available yet as of the moment, but a workaround is available to prevent people from exploiting this hole.
You can read the workaround for fixing this Windows Hole here. It involves editing the Group Policy if you are using Active Directory and modifying the registry for stand alone Windows.
If you are in a company using Windows OS, inform your IT administrators / network engineers about this problem to secure you network.