Some ideas to try:
1. Incomplete Download File won't delete at all (click on link) & perhaps also How to take ownership of a file or folder in Windows XP (click link)

2. To use LW again, try deleting your LW prefs folder. Find tips here Fixes for Limewire

Thanks, but I tried everything, it didn't work.
I tried the programs that should remove unremovable files, but those also crashed.
I didn't try safe mode, because my pc restarts, when I need to log in in safe mode.

I've got all the files that I don't want to lose out of the folder now. So I tried to make a new account, but my files to the new account and delete the old account. It still didn't work! I coulnd't remove my old account.

I could give the bug report my computer gives, but it's all in dutch, so I think that's no use.

Here some images, wich might be usefull:

http://img219.**************/img219/1394/fout1oe7.png
http://img187.**************/img187/411/fout2qh5.png
http://img219.**************/img219/7962/fout3xb5.png

There has to be 'image shack . us' at the pretty stars