Windows 8.1 64 bit support assistant install problem

can you run the installer again and let it fail 

Now open event viewer and check the error code/message for installation failure. 

Post error code here

I download support assistant installer.exe file..After running on windows 8.1, it keep on updating .net 4.5.1 and shows downloaded and reboot your system.Help me to install this 

After rebooting, it again start from first.

Support assist is not a necessary App for windows. You can skip it. Time for a new computer or upgrade to Windows 10.

Windows 8 is no longer supported fully. See your download page-

Support for Inspiron 3521 (End of Life) | Drivers & Downloads | Dell US

If it can run Windows 8.1 64bit it can run Windows 10 64bit.  Why are you punishing yourself?  I'm running Windows 11 on a 2012 vintage Latitude E6530 and it runs as good as the previous installation of Windows 10.  This machine originally came with windows 7 pre-installed.

-Ray

With windows 8 and 8.1 Dot net framework is bugged 

Check for windows update and see if under optional update you are getting Dot net framework or not 

I was able to download Dell Support Assist but, I can't find the application? In my Control Panel it's located under programs but nowhere else??

@Mary G​ and if you have no desire to upgrade ? Windows 10 is already on the way out and Microsoft are  pushing 11.

Increasing profits by planned built-in obsolescance, perhaps ? Besides, Tried 10, didn't like it  and it will NOT run my collection of old games. XP, Visa, 7 and 8.1 all do it for me!