That sounds highly plausible. How would you go about fixing that?
From bioware tech support:
1.04: How do I manually uninstall Neverwinter Nights? If you need to manually uninstall Neverwinter Nights, follow these steps:
1. Delete the folder where the game was installed
2. Remove the entry from the start menu
3. Remove the following Windows Registry key using RegEdit:
MyComputer \HKEY_LOCAL_MACHINE \SOFTWARE \Microsoft \Windows \CurrentVersion \Uninstall \{7C503E58-B2BC-11D5-978A-0050BA84F5F7}
4. Remove the following Windows Registry key using RegEdit:
MyComputer \HKEY_LOCAL_MACHINE \SOFTWARE \BioWare \NWN \Neverwinter
5. Remove the hidden folder:
C: \Program Files \InstallShield Installation Information \{7C503E58-B2BC-11D5-978A-0050BA84F5F7}
(where C: is the drive on your system with the Program Files folder)
At this point, there should be no traces of the game on the system.
***********************************************************
If you need to manually uninstall NEVERWINTER NIGHTS GOLD EDITION, follow these steps:
1. Delete the folder where the game was installed
2. Remove the entry from the start menu
3. Remove the following Windows Registry key using RegEdit:
MyComputer \HKEY_LOCAL_MACHINE \SOFTWARE \Microsoft \Windows \CurrentVersion \Uninstall \{A4C10EEF-D26C-410D-82E7-73370C6FD812}
4. Remove the following Windows Registry key using RegEdit:
MyComputer \HKEY_LOCAL_MACHINE \SOFTWARE \BioWare \NWN \Neverwinter
5. Remove the hidden folder:
C: \Program Files \InstallShield Installation Information \{A4C10EEF-D26C-410D-82E7-73370C6FD812}
(where C: is the drive on your system with the Program Files folder)
There should be no traces of the game on the system.
***********************************************************
If you need to manually uninstall NEVERWINTER NIGHTS PLATINUM EDITION or NEVERWINTER NIGHTS DIAMOND EDITION, follow these steps:
1. Delete the folder where the game was installed
2. Remove the entry from the start menu
3. Remove the following Windows Registry key using RegEdit:
MyComputer \HKEY_LOCAL_MACHINE \SOFTWARE \Microsoft \Windows \CurrentVersion \Uninstall \{C1583439-B034-4881-819C-D52A0587662B}
4. Remove the following Windows Registry key using RegEdit:
MyComputer \HKEY_LOCAL_MACHINE \SOFTWARE \BioWare \NWN \Neverwinter
5. Remove the hidden folder:
C: \Program Files \InstallShield Installation Information \{C1583439-B034-4881-819C-D52A0587662B}
(where C: is the drive on your system with the Program Files folder)
There should be no traces of the game on the system.