Adaware issue

[ASH1982]

I am currently fixing a friends laptop and have ran adaware just to make sure its clean
The software has found 12 critical issues (all of which are classed as "redirected hostfile entrys"

I have tried clicking both remove and quarantine but when I do this nothing happens or the software freezes for a while then displays an error message stating that deletion/quarantine has failed

Any ideas how to fix this?

I have tried in safe mode and have the same issue
The OS is windows XP service pack 3 btw

 

[ASH1982]

I tired to open the host file using notepad and manually delete them but it then refused to save

"Cannot create the C:\Windows\System32\drivers\etc\hosts file.

Make sure the path and file name are correct"