metatrader head scratching!

Hi all,
Could anyone help me?

Over the last few weeks i cannot get any indicators i have downloaded to work

I know how to do it i have previously downloaded stacks which have worked no probs.

now if i go into navigator and click onto newly downloaded indicators nothing happens;
could anti virus taken something out to stop them working.

I would appreciate any input

Thanks in advance

In Indicators Folder Search For *.dat File, Delete It,
Reastart Mt4 And That Is It!
Regards