Known system changes:

Files
%programfiles%\Dr. Guard\drguard.exe
%desktop%\Dr. Guard.lnk
%desktop%\Dr. Guard Support.lnk
 
Folder
%programfiles%\Dr. Guard
%startmenu programs%\Dr. Guard
 
Registry Entries
Key: HKEY_CLASSES_ROOT\CLSID\{5E2121EE-0300-11D4-8D3B-444553540000}
Key: HKEY_LOCAL_MACHINE\SOFTWARE\Dr. Guard
Key: HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\Dr. Guard
Key: HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
Value: "Dr. Guard"