try the following to remove this corrupted installation:
- rename BladeLogic/NSH to NSH.old
- uninstall again from Add/Remove Programs; it should fail due to files no longer exist, but will offer to remove the Add/Remove entry - hit ok to remove
- try installing 8.2.2 version again
- if still doesn't work, then along with removing this folder, also remove all instances from registry that have "BladeLogic/NSH", and then try installing again.