The module ntdll.dll provides access to Windows Kernel Functions.
There are a few possibilies causing this fault:
1. The DLL is not registered,
A: type: regsvr32 C:\Windows\SysWOW64\ntdll.dll or regsvr32 C:\Windows\Sysytem32\ntdll.dll into the start menu, although there may not be an entry point as it was not designed to start this way.
2. The DLL is corrupt,
A: type cmd into the start menu, right click it and select run as administrator, then type sfc /scannow*
*this will cause loss of customisations such as boot/logon screens/start orbs.
3. There is a conflict, commonly pointed at the NVidia Driver
, since you have an NVidia card, this could mean you.
A: Download the latest Nvidia Driver from their website, reboot into safemode, go to Programs and Features in the control panel. Remove all Nvidia Entries, Reboot into normal mode. Install the latest Nvidia Driver, minding the bloatware (e.g. Nvidia control panel, SLI, Stereoscopic 3D surround etc, just what you need, i.e. driver and physx, unless you have a 3d monitor) there is often a check-box incase you wish to make a clean install, if so, check it.
4. Malware is interfering with the install.
A: Download, install and run Malware Bytes Anti Malware, Download, install and run Microsoft Security Essentials.