What is a good web history tracker unknown to user that runs as a service (automatically starts when win pc turns on)that doesn't appear in task or status bar regardless of browser?

Is that not illegal? Spying on someone and shit?

"Before deciding whether to introduce monitoring, your employer should:

be clear about the reasons for monitoring staff and the benefits that this will bring identify any negative effects the monitoring may have on staff. This is called an impact assessment consider whether there are any, less intrusive, alternatives to monitoring work out whether the monitoring is justified, taking into account all of the above. Except in extremely limited circumstances, employers must take reasonable steps to let staff know that monitoring is happening, what is being monitored and why it is necessary.

Employers who can justify monitoring once they have carried out a proper impact assessment will usually not need the consent of individual members of staff."

You have to tell them so there's no point having one that doesn't show up