The AOL stopped working error could arise on several other platforms as well. So below are some tips that can be applied on any of the platform to fix AOL issues:

Always Clean browser cookies and caches.
Update your browsers to the latest versions.
Upgrade your AOL desktop versions to the newest versions.
Delete the bookmarks and then Sign in to AOL mail.
Remove the additional plug-ins.
Keep your system virus free.
Free the RAM memory

AOL Email Not Working
Canada, Computer, Quick Hacks to Resolve AOL Not Working Issue