In IE8 look in tools menu, manage add-on - find out where that pkr.dll belong. Update could be available to fix problems. If you google pkr.dll it could belong to more than one thing. pcguard, rogers, verizon something pop blocker. Could be part of hp-junk not 100% comptiable with IE8.
After killdisk and reinstall you and AVG "cleaned" up a terminator.exe in hp/bin folder and was told it was probably a false positive. Google says AVG already took care of that in 2003 http://www.velocityreviews.com/forums/t185...ible-virus.html
but harmless and perhaps worlds oldest FP. "Backweb" HP feature. Does not seem connected but who knows. Well, search hd for pkr.dll if it does not seem to be part of add-on. If it is disable and look in add/remove, uninstall.