Reinstall your Operating System and avoid any Dell Software. That was the only way that I could completely get rid of it. Support Assist is poorly written code; failure. Avoid it and second guess all other Dell software.
You can try this...
1) Uninstall Dell SupportAssist and Dell SupportAssist Agent from Control Panel – Programs & Features
2) Remove these folders
3) Click on start run, type regedit, this opens the registry. Make sure the SupportAssistAgent folder does not exists in this location, HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Dell\SupportAssistAgent. If the folder is present right click and say delete.
4) Restart the machine
Social Media and Community Professional
Can you try to stop the Dell SupportAssist service and then try to uninstall?
Joe has posted some steps in this blog, you may want to have a look at them too.
Let me know how it goes.
Joe - please help. I too have issues with Support Assist. I have tried to uninstall the Support Assist from control panel/uninstall and it won't do it. I tried to go to my program file and delete both Dell Data Vault and Support Assist and it won't delete files. My computer is new and only used for checking email and quickbooks.