Registry

Hi, I have these 3 registry troubles, any helps are welcome:

1. could this have anything to do with updating windows or IE? I use XP, not NT. Why are there all sorts of NY entries on my pc? autorundisable registry - what does this mean? [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\IniFileMapping\Autorun.inf]@="@SYSoesNotExist"

2. IObit found these entries. the first one won't delete:

Unused File Extension {80b8c23c-16e0-4cd8-bbc3-cecec9a78b79} HKCR\{80b8c23c-16e0-4cd8-bbc3-cecec9a78b79}

ActiveX/COM Issue InProcServer32\C:\Program Files\IObit\IObit Security 360\IS360Ext.dll HKCR\CLSID\{364BB365-5DF0-45D4-92C5-B0A4F0962C9D}

3. there is a key with the same name as main off the main key like this
HKEY_CURRENT_USER > then a bunch of eys under this main one, then an entry off that one is
HKEY_CURRENT_USER >SOFTWARE > Microsoft > Windows > Current Version > RunOnce
I backed up and saved copy then deleted it. was that ok? that was a week ago and all is well. was that a spy? how can i know if someone has remote access to my system? there was a entry for another user in registry 6 months ago and i deleted it.

go to run prompt "services.msc"

then find a service named "remote registry " go to its property & set its startup type as manual & stop the service..

this will disable access to registry from remote,
or get Regrun & scan you PC...
http://www.greatis.com/security/

that upto you, if you are the only person using the pc, then turn it off..
for your safety get firewall along with you antivirus.. it's ok for home users..