Dear @Macropod thank you so much for the help. yeah I uninstalled them via the Wndows Control Panel and repaired them but the same error appeared. Actually the unwanted software that I uninstalled were some software I didn't use anymore such as Minitab, Maple, Lingo, Opera Browser, etc. I don't know what to do. I have the same problem with Adobe Reader and I can't even enter Adobe related websites and forums. Please help me