MSDERUN.EXE is a harmful program,it is a trojan FakeAlert that uses to install Defense Center,Defense Center is a fake antispyware software.
Automated Get Rid of MSDERUN.EXE or Fix MSDERUN.EXE Related Errors:
Step 1: Reboot your computer, keep pressing F8 key and select “Safe Mode with Networking” with your arrow key. Press Enter key and your computer will boot in Safe Mode.
Step 2: Download Malwarebytes’Anti-Malware ( Download Link ), ( Malwarebytes’Anti-Malware information )install it and update its database to the latest. After that, reboot your computer to make Malwarebytes’Anti-Malware fully functional, repeat Step 1 into Safe Mode and run a full scan of your computer.
NOTE: If you have problem installing Malwarebytes’Anti-Malware Software, you can rename the installer to winlogon.exe or iexplore.exe. Then double click the program and follow the install steps.