Error 404. The requested page "URL" was not found

I found lots of errors all from my own account to website which says a page not found.
It seems it was a plugin I used and uninstalled it.
And there's some LOG ERRORs which was generated by GUEST account:


Error 404. The requested page "URL" was not found



1. Please tell me how can I solve this problem. I searched so many NopCommerce topics but not found any solution yet.

2. Can I disable "Guest" account? it is making trouble for me.

shahabset wrote:
It may be related to services trying to index your store. There was special account created by nopCommerce. See Andrei post about.

shahabset wrote:
What kind of trouble it makes? By adding log errors? You may set clear log task which will remove log errors, or you may restrict 404 to add any entries to log (Configuration -> Settings -> All Settings and look for  commonsettings.log404errors and set it to true).

Regards,
Tom

Thanks,
That was helpful