I have just bought a AMD ATHLONE 2600 PRO MODEL 40 Gig hard drive 256DDR RAM which has Spybot installed on it. I ran 'check for errors' not expecting to find anything. But (in red meaning real threat) was 'DSO Exploit 1 entries Registry change' It also said 'HKEY_USERS\.DEFAULT\Software\Microsoft\Windows'. I clicked the 'fix the problem' button, but it will not go away. What is it and how do I get rid?