5745G sometimes boots, or runs very slow, or hangs
I paid Acer about £50 to have my 5745G repaired in March 2013 because it wouldn't boot properly, or if it did boot it didn't operate properly. This is the same problem it had in August 2012. In August 2012 it was returned with the Windows 7 OS re-installed. In March 2013 it was "repaired" with the diagnosis that it had the wrong system image. Now it has stopped booting again, or if does boot it runs very slowly or it hangs - this the same problem as both previous occasions. Please tell me how I can ensure that my 5745G will be repaired PROPERLY if I send it back to Acer yet again.