Eddy is right.
Loads of viruses are written in Delphi.
So for instance make sure you do not have Win32.Induc delphi virus,
which changes SysConst.dcu so that all applications you compile will be infected.
Use
http://virusscan.jotti.org/ and not VT which may accumalate FP detections.
(e.g. such as WriteProcessMemory).
Try to localize in your programming code the FP API calls that may trigger a scanner.
Make changes to a test application so it will no longer flag general heurictics.
Know that a lot of FP in Delphi are caused because of obfuscation in packers.
The routine often is take no chanced with obfuscation flag first evaluate a FP report later.
Info credits go to user478955
polonus