For Win XP SP3:
1. I unchecked "load start up items" and restarted. Problem disappeared.
2. All items at the tab-next-to-the-services-tab (I don't know the english name for it - running? autostart? ;) ) became unchecked as well after reboot. I left this box unchanged after rebooting.
3. I actived some elements in this tab again, checking whether anyone is responsible for the bug, but I turned on all I need and bug didn't reoccur. It's definitely not:
dumprep
jushed (java)
AVG Anti-Virus or Comodo firewall ;)
Still it can be:
nvmctray (or other nvidia useless memory eaters... but not nvcpl on the other hand, I have it running now)
...or any other app which I turned off by unchecking the box decribed above and I don't know about. I have many services turned off, but only after unchecking the "start up" box I got rid of bug.
This issue should be patched, it's a long time since it's been reported for the first time and it doesn't seem to be complicated.