Cannot install Windows Defender definition updates
When I try to install definition updates, I receive the following code: 0x80070643. Please help. Thanks
Keys to the Problem Cannot install Windows Defender definition updates
This problem occurs when Windows Installer encounters an error.
Error code 0x80070643 and error code 0x643 are provided by Windows Installer.
These error codes are generic errors that basically state that an error was encountered by Windows Installer.
I would suggest you to follow the steps mentioned in the link below
You receive error code 0x80070643 or error code 0x643 when you use the Windows Update or Microsoft Update Web sites to install updates
You may also download and install the latest definition update manually
How to manually download the latest definition updates for Windows Defender
Let us know if this works or you need further assistance
Thanks and Regards:
Microsoft Answers Support Engineer
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To check for Windows updates
- Open Windows Update by clicking the Start button Picture of the Start button, clicking All Programs, and then clicking Windows Update.
- In the left pane, click Check for updates, and then wait while Windows looks for the latest updates for your computer.
- If any updates are found, click Install updates. Administrator permission required If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
Another Safe way to Fix the Problem: Cannot install Windows Defender definition updates:
How to Fix Cannot install Windows Defender definition updates with SmartPCFixer?
1. Download SmartPCFixer . Install it on your computer. Click Scan, and it will perform a scan for your computer. The errors will be shown in the list.
2. After the scan is done, you can see the errors and problems which need to be fixed.
3. The Repair part is done, the speed of your computer will be much higher than before and the errors have been fixed. You can also use other functions in this software. Like dll downloading, windows updating and print spooler error repair.
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