If the logo is copyrighted then you need permission to use it.
No, you cannot use a company's trademarked logo without their permission for any reason.
No, it is not permissible to use a trademarked logo for personal use without permission from the owner of the trademark.
no
It depends on how you are using it.
You need to get permission first.
No, it is generally not permissible to use a trademarked logo on a personal shirt without permission from the trademark owner.
Yes, it is illegal to use a company's logo on your website without their permission because logos are typically considered intellectual property and using them without authorization may infringe on the company's rights. It is best to seek permission or use alternative methods to represent the brand on your website.
A few unlicensed uses have been judged to be fair use, but the vast majority of uses of another's trademark logo requires permission.
With permission.
One would contact Dell in order to get permission to use the Dell logo. Using their logo requires express written consent so one must contact them by phone, email or letter. They have contact information on their official website.
No, not unless you have it written on paper that you are allowed to use their logo. In the copywrite world, it is considered stealing to use some company's logo without permission.