can't uninstall 9.3 edition to setup new ArcGIS Desktop 10

Discussion created by jumei on Feb 11, 2011
Latest reply on Mar 21, 2012 by davidoram
I can't uninstall ArcGIS 9.3 on the normal windows way: systemcontrol -> programs -> uninstall because there the old version do not appear. and when it was there the last time it also didn't work.

I tried it with the ArcGIS UninstallUtility which is on the new Desktop 10 version but then this message appears afer some time:

Error 1316. A network error occurred while attempting to read from file: C:/Windows/Installer/setup.msi

can anyone help me?