After loading PTE7 onto our computer (Dell XPS, Windows7) the following happened: 1. As with others, contention with AVG where AVG stated there was a Trojan virus. To rectify this we removed AVG and put the computer back to its factory condition. 2. This did not remove two further problems: a) When playing the .exe files the music or narration sometimes repeats itself for a few seconds so making the sound and pictures out of sequence. When going into the pte 6.5 and pte7 programme, as opposed to playing the .exe file, and playing the sequence the sound again repeats itself, often several times in different places. This is worse when one plays the programme immediately after booting up the computer. On repeat playing the repeats of music or narration sometimes the problem become less frequent or even disappears completely. This problem occurred with many different sequences made in 6.5 or 7. 3. Playing .exe files and pte sequences within the programme on another old computer(XP) seems to be trouble free so far. Playing the .exe files on a new Windows 7 computer is trouble free. Playing the music in Windows Media Player is trouble free. How can we return the computer to its original state?