PK bug.

Now, I personally don't use PK, but I have a friend who does and i'm posting this on his behalf, while he had PK installed a window kept popping up, crashing all his stuff, trying to install PK, even though it was.

So he uninstalled it, deleted every trace of it on his computer.
MSN quote(name's been cencored):
Volt: OHCR*PLOOKIT'SVOLLA! says:
btw
Volt: OHCR*PLOOKIT'SVOLLA! says:
I deleted everything concerning postality knights
Volt: OHCR*PLOOKIT'SVOLLA! says:
and it is still bugging my computer
V-Kaosu Haze.'Is that..all there is? No challenge..No..resistance?' says:
o.O
Volt: OHCR*PLOOKIT'SVOLLA! says:
trying to instal itself
Volt: OHCR*PLOOKIT'SVOLLA! says:
while it was already installed
V-Kaosu Haze.'Is that..all there is? No challenge..No..resistance?' says:
odd
Volt: OHCR*PLOOKIT'SVOLLA! says:
it just pops out of nowhere all of a sudden
Volt: OHCR*PLOOKIT'SVOLLA! says:
crashes every game I'm currently playing
Volt: OHCR*PLOOKIT'SVOLLA! says:
and when you click it away, it comes back for like 3 times
V-Kaosu Haze.'Is that..all there is? No challenge..No..resistance?' says:
I think that happened to me at one point around 2 years ago, I can't remember how Ifixed it
Volt: OHCR*PLOOKIT'SVOLLA! says:
I did a search on postality knights and I deleted everything
Volt: OHCR*PLOOKIT'SVOLLA! says:
it's still doing it
V-Kaosu Haze.'Is that..all there is? No challenge..No..resistance?' says:
This calls for!
V-Kaosu Haze.'Is that..all there is? No challenge..No..resistance?' says:
THE CRANKEYE.COM RPG MAKER XP FORUM HELP SECTION!

So yeah, sorry for bugging you guys with such a trivial matter, but does anyone know how to fix this?