My suggestion is that you not revert TEMP back to the way it was. When I had the same installation issues as everyone else I tried running the Window's Compatibility Troubleshooter (right-mouse click on an executable in an Explorer window end then click on Troubleshot Compatibility within the popup that ensues) and it failed. That problem also disappeared (coincidentally) after I changed TEMP and TMP. I also mentioned in an earlier post that Intuit wanted me to install a program that would allow them to look at my desktop but was unable to. I forget now the exact error code it output (at least it output an error code), but the usual cause of that error code is an invalid command line argument. This additional problem also got resolved with the change of environment variables. My guess is these programs are using these directory names in a context that requires that they be surrounded with double-quotes if they contain spaces but they are not doing that.
