Best course of action - get a Mac or an iPad and you can skip all the anti-virus cost and have a much more enjoyable experience. You are using a non-supported operating system that is prone to exactly the type of issues you are experiencing. If you enjoy the pain, keep patching it and restoring and wiping the hard drive and doing safe mode and asks strangers for help.
Running excel on an ipad?
You don’t actually use computers for work, do you?
$$$$ You are using a non-supported operating system $$$$
ROTFLOL!!! You just set off my idiot alert.