Be a bit more specific please, What does the error message say, and what is it that you want to do exactly?
On a side note, deleting java is not a smart move, even simple websites may tell you to use java. So wht is it you want to delete it
If normal uninstall doesn't work, I would recommend downloading CCleaner, totally risk free, no virus or anything. Here's the link http://www.piriform.com/
Download it and run a registry scan, then try uninstalling via CCleaner.
Hope this helpes