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Which red Xs ? Where are they ?
If they're ontop of an icon, what icon are they ontop of - what does it look like, or what is the icon for if you know that ?
If you have red Xs in Device Manager beside lines for certain devices, tell us what the lines are for, double click on that entry and tell us what the message says.
Usually that indicates the device has been deliberately disabled by some computer user
If you have red Xs in your Taskbar lower right on your main desktop screen over one or more icon(s), that indicates that program or device the icon is for not working, or something is disabled, or is not active, or it's experiencing an error.
- if you are using a wireless networking adapter between your computer and some device to access the internet, and if there is no network cable connected to your wired network adapter, you may have an icon that looks like two tiny computer screens with a red X over it. That's for the wired network adapter's connection.
If you never have a network cable connected to it, you can go into Device Manager and double click on the entry for it and choose to Disable it - it will then have a red X beside the entry in Device Manager and the icon for it will not show up in your Taskbar.
- if you disable something in your anti-malware program, there may be a red X over the icon for that program in your Taskbar . You may or may not be able to get rid of that red X by changing (a) setting(s) in the anti-malware program. Or - the anti-malware program may have just updated it's program files and there is a message there when you click on the icon that you need to Restart the computer .