Today on a desktop I use only occassionally, I noticed my AV avira was partially disabled and asking for a restart.I restarted several times,without sucess. I decided to uninstall and reinstall Avira. This is when my problems started.I kept getting access denied errors, I already had appguard on install, but to be sure I exited appguard and used msconfig to make sure appguard did not start. To cut a long story short, I could not install any programs or uninstall either. System restore failed. Access denied errors or you need admin rights etc. Only when i uninstalled appguard did everything come back to normal. Everything is now fine. While i realize appguard is effective in stopping malware, it has caused me to much trouble today. So it's coming off my system.