I don't really get how you have an antenna on your laptop, but if you do, it does not effect it.
No, not usually.
There is not a specific place to put it.
Closing an account will affect your credit score and decrease your score.
1975. It was portable, but it didn't use flipping for opening and closing.
If it doesnt affect the PC then it wont affect the laptop as well.
An old antenna blowing in the wind can be troublesome causing flickering in the picture, etc.
You could attach an external directional antenna. Google for 'wireless antenna'.
Yes, This is for adding a wireless antenna to a desktop or laptop computer that does not have wireless built in. You still need a wireless router connected to your internet provider.
Does it affect a laptop or desktop when an activated mobile phone is kept near to them?
Nope it dossent affect your mobile phone
Closing a brokerage account does not directly affect your credit score because brokerage accounts are not reported to credit bureaus. However, if you have outstanding debts or margin loans associated with the account, closing it could impact your overall financial situation and potentially affect your credit indirectly.
No unless closing your specific laptop bring it to sleep mode or something...