Reminder apps. On start up of computer?

Due to a brain injury I have severe short term memory loss. I'm looking for an app that will pop up a to do list when I turn on my computer. Preferably dated so I can fill in items on a "need by" status. Something that would not be to confusing, (another little side affect of the injury)

Some free reminders for PCs, (probably worth your paying for premium versions) http://www.techsupportalert.com/best-fre…
Here's one Android phone/tablet app called Life Reminders https://play.google.com/...pps/detai…" class='ext_link'>https://play.google.com/...pps/detai…
Some for Apple mobile http://www.imore.com/...der-task-…
Keep an eye out for smart watch reminder programs, which would be handy for when your are on the run https://play.google.com/store/apps/detai…

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