Hi Ron,
It's a very hot Saturday afternoon here ( 30 C at the moment ) :smileyhappy:
Regarding the HP updates, yes you can quite happily manually update from your PCs Product Page - these can be found on the following link.
As far as reinstalling Windows Updates, I can't see any reason not to do this now, but it may be wise not to install all of them in one go - when you get the list of available updates, de-select all but say 3 of them and then install them. Let the PC idle for 5 minutes just to make sure the updates configure and then restart the PC.
If it still loads Ok, apply another 3 updates, let it idle for 5 minutes after the installation and then restart again.
Repeat this until all available updates have been reinstalled.
If after a restart, the loading issue re-appears, let me know the 3 updates that were installed immediately before the problem re-occured.
Best regards,
DP-K