Acer 5250 I'm receiving set up is starting services.can you help

Anthony west, on the same error screen (where you get the message "setup is starting services") press SHIFT+F10 and it will open up a black Window (a command prompt window) In the black windows type the word "regedit"(without the quotation marks)and hit enter. That will open the registry editor. In the Registry Editor.. Browse to.... HKLocal machine/SYSTEM/SETUP/STATUS/ChildCompletion, and after highlighting childcompletion, on the right hand side check for setup.exe. If the value is 1 change it to 3.(by double clicking on setup.exe and changing the value shown in the box). Then close the registry editor and then also close the black window. Then click on OK for the error and the computer will restart and the installation may complete. from here