Problem, as shown in the following example:
Failure Analysis:
Generally, this happens because the computer mistakenly deletes the system files or the system files are damaged by the stubborn Trojan.
Workaround:
1, download 360 security guards, find inside the first aid box to start first aid, and then repair, completed and restarted;
2, download rising anti-virus software, cleaning up the system, check the Trojan, clean boot up the wrong items, etc.;
3, with the system with the System Restore, restore to you do not appear when the failure to repair (or use the restoration software to restore the system, if not into the system, boot press F8 into the safe mode to restore the system);
4, if the failure is still, using system disk repair, open a command prompt input Sfc/scannow return (SFC and/between a space), insert the original system disk repair system, the system will be automatically compared to repair;
5, if the failure is still, set the CD-ROM in the BIOS for the first boot device to insert the original system installation disk press R key to choose "Repair Installation" can;
6, if the failure is still, it is recommended to reload the Win7 operating system.
The above is the WIN7 flagship system prompts the application error code 0xc0000409 fault reasons and solutions to all the content of the introduction, I hope that the six methods can help everyone!