password will only work on one pc?

Tried to log in to my norton last night. It said  password wrong.but will work on other pc. deleted cookies etc. no difference. OK solved that

 

Also i am getting the download via dl manager. will that leave a package i can burn for back up? And why does dl manager have to run at start up each time

 

OK now updated on two pc's. No package. It was an upgrade. What do I do if my computer crashes?

 

What is http://systemexplorer.net/filereviews.php?fid=4378696 running each start. Is it the nav sidebar?