Error Message by Antivirus program: pdcviewer.exe tried to execute shellcode as a result of a possible buffer overflow attack

This error message may be displayed by over-sensitive anti-virus applications.  It is a false positive.

Safeguard Viewer deploys system hooks during installation so that it can monitor use of the print screen key and processes running (to prevent third party screen grabbers and printing to certain print drivers) and the anti-virus application takes this to be suspicious behavior.

Comodo Internet Security Defense+ is one of these applications and is noted for its sensitive behavior – – “Additionally, while Defense+ is brilliant in theory, in execution it tends to be overly sensitive and actually hinders the user experience on the computer.”