Since I'm not a guru on computer's and don't know why your "Assistant" 'doesn't work anymore' all I can say here is it's worked wonders for me in the past two days. If you've got a disk that contains RA from Dell available you might try uninstalling the program you have and re-installing it again, may come back better than ever.

i had the same probs with mine, all of a sudden resolution assistant stopped working. i had to reinstall from the disk that was sent by dell and it is now working correctly.
Brian Jenkins

OK, here's a new Resolution Assistant twist for you. My RA wasn't fully loaded on my system to begin with, and I didn't get the RA Version Backup CD either. The backup that I was sent did have it (I found RA on it by accident, it was buried in submenus).

Now, when I try to uninstall RA it won't because I get an error message that the uninst.isu file can't be found. And when I try to install RA it won't because the installation locks at 80%. Also when I try to open RA, I get the error message that mad.exe can't be found.

Now what?