ok.this tool shd help u..SDfix...
If the Command Prompt window flashes on then off again on XP then follow these steps..
Click on the Start menu, then Run, and then copy and paste the following line into the Run field:
%systemroot%\system32\cmd.exe /K %systemdrive%\SDFix\apps\FixPath.exe
Then click OK, then type Y and press Enter when prompted, Reboot and start SDFix again
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SDFix
NOTE: you must be logged in as an Administrator and in safe mode in order for SDFix to work properly.