I too had troubles. I can't say for sure they were caused by this program, but it's the only thing different that I have done in quite some time on that machine.
I installed it last night, after about 10 hours it said it had used 1 second of cpu time.
My internet connection is through that machine, and I have Tiny firewall on it.
This morning there was a message on the screen that something wanted to connect from that comp to the outside, my wife was on it and she just clicked allow I believe. The machine just instantly restarted! Boom, black screen, Bios, Boot up, "Wow, what was that"!!
Then Things star t e d .. g e t t i n g .. . . r e a l l y .. . . . . s . l . o . w . . . . . . .
I . . . m .. e .. a .. n .. . . R . E . A . L . . . S . . L . . O . . W . . . . . . . . . . . . . . .
Tested bandwidth with Cnet: 33K
tested again: 34K
tested again: 33K
(ok, this is bad for a cable modem)
So I started restarting and power cycling the modem etc.. No joy,
So I started turning things off, Mcafee, no better, Tiny, no better, everything else, nope.
Uninstalled CapCal. Restarted machine. Tested bandwidth with Cnet (I have a cable modem) -
first test: 56K
tested again: 111K
tested again: 290K
tested again: 1170K
tested again: 2010K
tested again: 2760K
Final Test: 2170K
WEIRD!!!
Now all is well again, I hope that thing didn't leave any hidden surprises for me lurking in the bowels of the system.
Just my experience, I'm not saying for sure there is anything wrong with these guys but I will be very interested to hear what some of you have to say after you call them.