I have a AMD Athlon 64 processor, 3000+ 2.6 mB, 1.43 GB, using Windows XP Home (2002) 700 total physical memory. When I boot up, the Windows Installer icon will just sit on the desktop and also same with HP essential 3.5, which I remove with Windows Task Manager. Nothing else works until these two items are removed. I have an HP 4210, 3 in 1 photosmart which uses the HP Essential 3.5 program. I have looked everywhere for some help. Now as i type this, maybe the answer will come from HP.