At present I cannot run any programme installer except by right clicking and choosing 'Run as Administrator'. This has happened twice recently and the cause is totally unknown to me. I have just recently re-installed everything afresh, and this morning I have got the same problem - I clicked on an installer and the following error message popped up: Unable to execute file in temporary directory. Setup aborted. Error 5: Access is denied. Can anyone suggest a reason and a remedy for this? Thanks.