I would first check if your account is a local account, or a local account with administrative priviledges. You may already know, but just in case, search for control, then open the control panel. Click on Users. Your account name should show up with something like: Username, Local Account, Administrator, Password protected. If it's missing Administrator, then click on Change your account type and elevate it to Administrator. For the name of the PC, which I believe has to be changed by an administrator priviledged account holder: Click on Settings, System, and at the top of the screen is the system product name and a linke to change the name. Or, click on "Domain or workgroup". The Tab Computer Name should be highlighted by default, click on "Change" and you can rename it to what you want. And, you can go to Microsoft.com and sign into your Windows account (using an email address /passwrod. There you can see who Microsoft thinks owns your PC, what programs you have purchased from MS, and you can re-download the programs you need if they were deleted from your PC. If you have bit-locker turned on, or had it turned on, by default, your bitlocker keys are saved to your microsoft account. there you can see all of them that you ever had, and delete out the old keys.
