Does Reinstalling Windows Delete Everything?
My Windows computer has slowed down and is not speeding up, no matter how many apps I uninstalled, so I want to reinstall Windows. But I worry I will lose my data if I do that. Does reinstalling Windows delete everything? Any advice will be appreciated.
Best Answered by
Jerry· Answered on Jan 21, 2026
Does reinstalling Windows delete everything? The answer can be Yes and No. It depends on what options you select.
When reinstalling Windows, you will be prompted to choose whether to delete everything, keep your files, or keep all of your files and apps. A clean reinstall can be done if you have backed up your data. You can decide whether to keep your files or any installed apps if you don't.
Generally speaking, everything on your system drive (C drive) will be erased if you reinstall Windows, and data on your D drive or other drives will remain intact.
But creating a backup is important to you in any way you select because sometimes improper operation cannot be avoided. In that case, data backup is the most reliable and safest way.
If you plan to back up your files on your computer, Using professional backup software like EaseUS Todo Backup is the most effective way.
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EaseUS Todo Backup is easy-to-use backup and restore software for Windows 11/10/8/7. It can help you automatically back up your files, systems, disk, partitions, and apps. In addition, it allows you to create scheduled, full, incremental, and differential backups. And it can also help you reinstall Windows without losing games.
No matter what kind of options you select when reinstalling Windows, creating a backup using professional backup software, such as EaseUS Todo Backup, is important and necessary.
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