Wrong CPU type DLL

Question

Yesterday I had put a lot of dlls (mostly from redistributables) in system32 but all of them was with wront cpu type (64 bit or 32) now half of my programs can't launch because of that. Is there an easy way to delete dlls with wrong cpu type?

**moved from Windows / Windows 10 / Windows settings

Answer 1

You will need to reinstall Windows 10:

Go to a working computer, download, create a bootable copy, then perform a clean install.

	Step 1: How to download official Windows 10 ISO files 

	[http://answers.microsoft.com/en-us/windows/wiki...](http://answers.microsoft.com/en-us/windows/wiki/windows_10-windows_install/how-to-download-official-windows-10-iso-files/35cde7ec-5b6f-481c-a02d-dadf465df326)



	Step 2: How to: Perform a clean install of Windows 10

	[http://answers.microsoft.com/en-us/insider/wiki...](http://answers.microsoft.com/en-us/insider/wiki/insider_wintp-insider_install/how-to-do-a-clean-install-of-windows-10/aef0ae63-2117-41ee-a8ea-4a3181625b08)



If there are files on the drive you want to recover, see -  How to: Perform a Custom install of Windows 10

[http://answers.microsoft.com/en-us/insider/wiki...](http://answers.microsoft.com/en-us/insider/wiki/insider_wintp-insider_install/how-to-do-a-custom-installation-of-windows/38adfa8c-32f8-4354-8c53-13b5f2cf7e44)

Answer 2

Hi Grzegorz. I'm Greg, a volunteer installation specialist and 8 year WIndows MVP here to help you.

What I would do if you haven't yet is manually install Fall Creator Version 1709 by installing Media Creation Tool and choosing to Upgrade Now. http://windows.microsoft.com/en-us/windows-10/m.... This the most stable method to upgrade to the new version (which you need anyway) and will bring you fully up to date with reinstalled Windows that often will solve any other problems you have.

You can use the same tool to download the ISO or create bootable media so you only need to do it once, and have the bootable media for repairs or possible Clean Install.

If there are any hurdles during the Upgrade see these steps to optimize the install as this is evidence it's corrupted: http://answers.microsoft.com/en-us/windows/wiki...

if problems persist with the new version then you can roll it back and hide it with the Hide Updates tool to wait for it to mature more: http://www.thewindowsclub.com/rollback-uninstal...

Hide Updates Tool: https://support.microsoft.com/en-us/kb/3073930

Then go over this checklist to make sure the install is set up correctly, optimized for best performance, and any needed repairs get done: http://answers.microsoft.com/en-us/windows/wiki...

But remember that a factory or Upgrade install are inferior installs that most enthusiasts would never run in the first place because they'd expect endless issues. Most prefer to do the gold standard Clean install from this link which has had no reported issues: http://answers.microsoft.com/en-us/windows/wiki...

I hope this helps. Feel free to ask back any questions and let us know how it goes. I'll keep working with you until this is resolved.