Cant install Agent?

ive tried to reinstall the agent a few times, I had it installed and working, it seemed to crash, then once i reinstalled it it gives me error "c:\users\david\appdata\roaming\lab02research\hass.agent installer\2214.0.3\hass.agent1.cab. verify that the file exists and that you can access it" after i agree to the licence terms and conditions and clicked the big green install button I have tried: uninstalling it using the built in uninstaller using revo uninstaller in case it had some previously saved settings causing problems, revo uninstaller doesnt show hass agent as being on the computer at all getting new versions of HASS agent, deleting the folder it was referring too running it as administrator running it from desktop asking my colleague who also runs HASS agent if he has any ideas Leaving it for around 6-9 months all with no avail and still cant get it working i have tried installing it on my laptop and it goes past that part fine i haven't tried rebuilding my windows install,