I got 4 security updates on April 9. After the required reboot, I now have these problems: 1. Everything loads and runs much slower. 2. After my screensaver starts, the screen freezes. It takes over 2 minutes to revert to the window following a keystroke. 3. I have Microft Plus Digital Media Edition. This no longer converts its recordings to digital files. 4. Windows Installer won't work. I tried to reinstall Digital Media and got the message: "The Windows Installer Service could not be accessed. This can occur if you are running Windows in Safe Mode (I'm not) or if the Windows Installer is not correctly installed." I couldn't find anything hepful in MS Support pages. My OS is XP Home, my Installer version is 3.1 (KB893803) In general it's the Microsoft programs that are worst, eg any Office program. Non Microsoft programs are still functioning reasonably well but not so quickly as previously. I ran a virus check: nothing.