Please help me!!. My laptop experienced this problem. When booting its fine but later while entering windows (desktop displays) there is a continuous flash of the DOS screen (cmd window). After I experienced this problem my virus scan (McAfee 8) could not respond anymore. Try to reinstall but the installer on the process just flash out, it just disappear. Try repair install (window xp 2003 SP2) but no change. Please anybody help me if you know any tip just inform me. Thanks in advance.