Knowledge base for software setup, errors, and daily tool work.

SSH Permission Denied (Publickey) on EC2: Setup Fixes

If you're seeing "Permission denied (publickey)" when trying to SSH into an AWS EC2 instance, the...

Fix Windows 10 Product Key Not Working After Hardware Change

You replaced a major component—often the motherboard—and now Windows 10 says your product key isn...

Fix Windows Security Token Expired Permissions Denied Error

If you see 'security token expired' or 'permissions denied' when accessing files, folders, or net...

How to Fix Outlook Rate Limit Error in Office 365

Understanding the Error

You may see a message like "Too many requests" or "Server busy" ...

Fix Infinite Login Loop via Command Prompt

You sign in to Windows, the desktop appears for a moment, and then you're back at the sign-in scr...

How to Resolve Task Scheduler Version Mismatch

If you see an error like "Task Scheduler version mismatch" when trying to create or modify a sche...