All CNX2 crashes on your machine state MSVCR80.dll as the faulting module. MSVCR80.dll is a "Microsoft C runtime library, version mismatches and other errors in the C runtime library commonly cause application failure on Microsoft systems.".
Gadgethemes.com - Download the repair tool to scan for errors such as msvcr80.dll in Windows 7, Windows 8/8.1, Vista and XP. Users of Microsoft Office may also receive MSVCR80.dll missing error .
The error may appear something like the following: “This application failed to start because MSVCR80.dll was not found. Reinstalling the application may fix this problem.”
Resolve Corrupted MSVCR80.dll Related Registry Entries
MSVCR80.dll file is registered in the system registry. If its registry entries are corrupted or missing, you may receive MSVCR80.dll missing error.
Modifying the registry and correcting the changes your own is really tough and insecure. Any incorrect registry change may make your system unstable. That is why; the best way to do this task is download a good Registry Cleaning Software and install it on your system. Run it and start a full system scan and fix the errors that found. Download Registry Scan Here.
Restore Deleted MSVCR80.dll File
MSVCR80.dll missing error notifies you that a significant file required to run Microsoft Office PowerPoint and Microsoft Office Outlook has been deleted, moved or renamed, thus no longer found on your system.
If you had accidentally deleted the file, then try to restore it back. The deleted file can be found in the Recycle Bin. If it is there, then right click it and select Restore option. Unfortunately, if it is not there in the Recycle Bin, then use an external file recovery software.
Check the Status of System Files
With the help of System File Checker (SFC) tool, solve MSVCR80.dll missing error by scanning the system files and replacing the corrupted system files with their original versions.
Insert Windows installation disc.
Click Start | Run.
Type SFC /ScanNow and press ENTER.
Restore the System
With System Restore utility, restore the system to an earlier date when Microsoft Office and all its instances were working properly. This is possible only when a system restore point is available; otherwise not.
Click All Programs | Accessories | System Tools | System Restore.
Follow the wizard your own.