The correct link for the current version of "Eraser" is:
http://www.heidi.ie/eraser/default.php
IMHO the need for a Guttmann overwrite,or indeed any more than 3-5 overwrites maybe,on a modern HDD,is distinctly overkill.Indeed,even with the excellent "Eraser",the recommended way to remove data pretty securely,is to overwrite the files a time or two,and then erase the free space on the HDD. There are so many factors involving the secure total removal of any data involved,that it could be said to be nigh on impossible,as Windows scatters data willy nilly in all sorts of areas! What about the paging(swap) file for example?
I feel that the current set up with CCleaner is very good,and if any further reassurance is required,the dilligent use of "Eraser" will more than suffice the average user.Of course,if you`ve really something to hide,a PC is not a good place to put it!