Guardant driver and guardant VDD NVKEYNT kernel driver

Hello, each time I attempted to open up my control panel directory, 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 message VDD gurdant message popped up saying that NVKENYNT kernel driver cant belocated.

Both problem appeared at the same time. i beleive I have been installing and uninstalling several trial software before the problem started.

I am using windows Xp SP2