can't do it. my disk does not have sp1. I have since installed sp1 and can not uninstall it because of the errors. you can't do a repair install to a lower version (from sp1 to no sp1) nor can you do a repair install with a slipstreamed disk. which is why i need to find a win 7 pro sp1 iso. msft pulled all the iso's off the digitalriver links that were around forever and you can't use the key from a system builder disk on the msft software recovery site.