Big and annoying issue with Office Outlook 2007!

Hi! So a friend of mine has been having an issue with Microsoft Office Outlook 2007. It all started this week, she turned on her computer and Outlook Office 2007 windows started to pop up non-stop. She tried restarting it but as soon as her computer was on the windows started popping up again. She contacted a repairman to help her and the first night everything was fine, I don't remember her complaining about it but the next night it started again; only 2 windows popped up. But the next morning everything started again, windows started to pop up, this time every 10 seconds but still very very annoying.

She has tried opening the task manager and closing Outlook but obviously that did not really help her. She has also tried deleting Outlook but I can't remember if she said she could not or that deleting it did not help. We have no idea if it's a virus or something else.

My friend has Windows Vista and I have Windows 8 so I can't help her much. She really needs to solve this issue since she can't work without a computer, thank you so much for the help!

This is a video she sent me:
video-0-02-05-a28a6573fe6e5de54af8c9e5f758d48a78416af1cb43c99d440c733c47617fe3-V.mp4 - Google Drive

Hi, yes she does have an antivirus and she did try to full scan her pc but she said it was too slow, will tell her again to do it and I will also send her both the link you just sent me. Thank you for the help, I will post here again as soon as she tells me if it worked or not!

Write down all settings for Outlook (for the accounts that are managed by it), then uninstall Outlook, reboot, then reinstall Outlook. Then set up the accounts in the new install.