ntdll.dll problem

I have used my computer for around 2 years, had one hard-drive removed, had windows changed, etc. Since around 20 days when I start Skype, Messenger and Metin2 they turn into not responding right when I start them and the last 2 close. I've checked in Event Viewer at administrative events and it seems like all of them are stopped by the ntdll.dll file. I tried lots of fixes found on google but none of them worked for me. I've reinstalled my anti-virus(norton internet security) but it still doesn't work. I've reinstalled all the programs like 10 times and still nothing. Thanks in advance for any kind of help.

ThrashZone said:

Please add any prior Uninstalled Security,
Fill in your System spec's page there's an easy tool to do it for you here,
https://www.sevenforums.com/tutorials/180324-system-info-see-your-system-specs.html
If you would like to take screen shots see this,
https://www.sevenforums.com/tutorials/9733-screenshots-files-upload-post-seven-forums.html
Use Safe mode with networking,
https://www.sevenforums.com/tutorials/69585-safe-mode.html
Clean boot,
https://www.sevenforums.com/tutorials/179159-troubleshoot-application-conflicts-performing-clean-startup.html
Troubleshooting for win-7,
https://www.sevenforums.com/tutorials/220165-troubleshooting-steps-windows-7-a.html
Optimizing windows,
https://www.sevenforums.com/tutorials/11728-optimize-windows-7-a.html

Thanks for answering :). I am at the moment in safe mode and the same error is appearing on my log for my skype. Metin2 starts up and closes without saying anything.