I understand the rationale behind you doing this, I’ve done it myself.
Your company sends you abroad for a week or two. You want to access your Netflix account but don’t want to do it on the company computer. On the other hand you don’t want to carry two laptops with you.
As others have said, tampering company hardware can get you in trouble with the IT department, and it’s enough to get you fired in some cases.
If you value your job get permission to do it or get yourself a tablet.