Since Spybot Home edition includes Antivirus,that would be a likely reason that you would see Error 577,as Windows Defender would probably disable itself if it detected Spybot.
In desktop mode,is the Spybot tray icon showing down by your computer clock?If it is,when you hover your mouse over it,does it show Live Protection:On?
In Event Viewer,if you click on Error,then click View All Instances Of This Event,then under Actions,click Find,try typing in Spybot,and any instances of Spybot will be searched for,if it's mentioned.I tried it,and found an instance of Spybot in there,so it should work.If something is found,it should be highlighted,you can doubleclick it,select Copy,then Paste it here.This will give me some things to search for,I may not find a solution,but it will help maybe narrow what is wrong down,and hopefully get me closer.I've searched for Runtime Error 217,but that's a bit generic,and there are many,many instances of it when searching,and I cannot narrow down what might be happening.
