Hi I have selected to delete previous runs from load screen but when I go to continue and check unatteneded it pops up Prior installs have this elcted un select it to leave unattended.. why is this? also how can I remove prior installs from the program?
thanks

Can you please to rephrase your question? And using keys like comma would be nice.

Unattended parameters are included in the source. Maybe from previous nLite operation, but now your source is modified anyway, so if you want to restart from fresh, you got to reload a fresh source.
nLite doesn't modify the winnt.sif (I think), it recreates it from scratch, so parameters that are not supported by nLite are lost if you select unattended over an already unattended source. If you're sure it's from nLite, just ignore the message.
And check your typos indeed.