Guardant driver and guardant VDD NVKEYNT kernel driver

Hello, I would be grateful if anyone could help. Each time I attempted to open up my control panel, a message popped up saying no guardant driver. However all the items in the control panel run without a problem
Next, I failed to install certain software. A VDD gurdant message popped up, saying that NVKEYNT kernel driver cant be located.
Both problem appeared at the same time. I beleived I have been installing and uninstalling several trial software before the problem started.
I am using windows Xp SP2 and have Zone Alarm firewall, Kapersky antivirus and anti spyware (spysweeper, spybot, spyblaster)