What is % of Maximum Frequency (perf monitor)?

[Leonard Grey]

If you have email scanning turned on in your security software, turn it off.

 

[Pat Coghlan]

For a long time I wondered why it took minutes from the time I clicked
on a URL in an e-mail (Thunderbird) until the web page opened in Firefox.

I investigated several counters in the performance monitoring utility,
and finally discovered that the counter called "% of Maximum Frequency"
kept ratcheting up to 100%. See
http://web.ncf.ca/~ff293/Images/For Newgroup.png

I can't find a good description of what this counter really indicates.

Can anyone shed some light on this please?

Thanks.

-Pat