As per above, if it's just the LICENSE then there may be two ways that works.
1. Just the license code (probably a VOLUME license?) so you need to create a DVD or USB install media, or
2. May be distributing physical discs.
*If you need to create the media yourself, likely someone can help you but in more detail it works like THIS:
a) browse to MS site for this:
https://www.microsoft.com/en-ca/software-download/windows10
c) download the Media Creation Tool and RUN it (have DVD or 8GB+ USB stick handy)
d) *Make sure it's the correct version of Windows. (W10 64-bit Pro?)
- may need to select "OTHER PC" option as it defaults to version to upgrade machine you are using
e) insert USB or DVD when prompted. Download may take a long time, especially if work connection is slow, so may want to do this at home if connection is faster.
Now, for INSTALLATION:
a) unhook any secondary HDD/SSD to be safe
b) boot to USB/DVD as applicable
- if previous OS then may need to change BOOT ORDER so the USB or DVD is first
- if previous OS then DELETE the partition during first part of install (make sure you don't need any data from it)
c) Select language, country etc during install and finish
d) *Part of install is option to input your e-mail and password. Make sure you have that HANDY. You can always do it later, but I recommend doing it during installation.
e) add programs, including the antivirus your company uses
f) setup FAN CONTROL software if motherboard support site has it (may be under W7 or W8 section). Most or all drivers should be installed by W10 or updates.
For CPU fan, the BIOS usually has some support at least. If NOISE isn't an issue I wouldn't worry too much about it.
g) run CPU diagnostic. for Intel it's here:
https://downloadcenter.intel.com/download/19792/Intel-Processor-Diagnostic-Tool
h) probably nothing in the BIOS to change, however BEFORE YOU INSTALL WINDOWS if you have a modern, UEFI motherboard (ask if uncertain) I'd go into the BIOS and disable the compatibility mode. (CSM or Compatibility Support Module). It's for legacy support like some older graphics cards, however if Windows installs then everything is compatible.
With CSM disabled, your system may boot slightly faster and be more secure. Of course, an SSD is the ideal solution for general bootup and "snappiness" so even though it's a work PC if you don't have one I'd consider putting in one yourself.
**You can get a new 120GB SSD for as little as $40!!
http://pcpartpicker.com/product/qf98TW/a-data-internal-hard-drive-asp550ss3120gmc
I didn't think my SSD made that big of a deal, then it died and I had to go back to a hard drive. Even though it only added several seconds to bootup everything just felt more sluggish to boot and use.