I seem to help people a lot with their computers so for myself, and anyone who happens to stumble across this page then this is what I tend to do…

 

Basic virus check

Install
Don’t try the 14 day PRO version or install any toolbars. Run a scan and remove anything found.
Install
For firefox. Stops all the annoying ads on the internet/youtube
Make sure Windows automatic updates are running
Make sure Flash player is up to date
Make sure Java its up to date.
The link will open a page with a button either asking “do you agree to run this” (if you have Java)
otherwise it will ask you to “install Java” – don’t do,
The page will then remove any old Java versions (if found) and update current version. If Java does update re run link above to remove the old version.
Restart PC. Install Windows Updates.