I don't think the sensitivity is the issue, but an option in the Sensitivity settings, Follow links during scan, may well have something to do with this, as it appears to be following a link (path).
So you could try unchecking that.
However, I believe the correct thing would be to check the environment variables and change the drive letter from D:\ to the correct drive letter.
Control Panel, Performance and Maintenance, System, Advanced, Environment Variables. Not sure if this is correct for your OS as it is from my XP Pro system, but from that you should be able to find it.