Have Anti-Virus or HIPS software installed? To avoid conflicts with Cloud Agent, ensure that you exclude the following files, directories, and processes from all security software installed on the system.
QualysAgent.exe - this is the Qualys endpoint service
setup.exe - non-MSI installer needs access to disk and registry locations (see below)
uninstall.exe - this is the Qualys endpoint service uninstaller - needs r/w/d access to following disk and registry locations
%PROGRAMDATA%\Qualys\QualysAgent - we read/write/create/delete files in this directory and sub-directories
%ProgramFiles(x86)%\Qualys\QualysAgent - this is where the service and uninstall live. The service will create processes so HIPS needs to make sure to unblock this action
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\services\QualysAgent - this is where the agent setup installs the service into the system.
HKEY_LOCAL_MACHINE\SOFTWARE\Qualys - this is where breadcrumb information lives to merge agent and appliance scanner results. The agent needs c/r/w/d access here; setup needs to create the key; uninstall needs ability to delete the key.
Calls CreateProcess to launch external proceses on occasion
Calls CoCreateInstance to instantiate COM objects
Creates/Reads/Writes/Deletes files out of its programdata directory
Creates/Reads/Writes/Deletes from the hklm\software\qualys registry key
Enumerates and reads from all file and registry locations