Lets sapose that you want to use the offer remote assistance function of Windows but someone has deleted the HelpAssistant account from the machine. If you Try to just make a new one by hand it wont allow remote assistance to work.
The process for making a new account is actually really simple and I was shocked that when I googled for this no one mentioned it.
In C:\Windows\ it should create new file "sessmgr.setup.log". go ahead and open it. It should contain the following:
Reboot the system.
After you reboot the system go to the user manager and you should notice that the HelpAssistant account is disabled. Go ahead and re-enable it.
You should now be able to send a remote assistance request.
*Make sure that you enabled remote assistance and that the firewall has the remote assistance ports open.