Buying a PC which has unlicensed Adobe (read whole text please!)

Buy another computer.  You don't want that one. 

Hello Scooozy, 

It's good to show your concern. Yes, you might get the problem. You might get the conflict error if you keep the crack software. If you really want to use software, please go with genuine version where you will get full support. Going to share the link to wipe out everything from your device and once you wipe out, place the new order and you will get the download and install link on your email. In the 2nd link you will see the system requirement for Adobe applications.

CC cleaner tool :

https://helpx.adobe.com/in/creative-cloud/kb/cc-cleaner-tool-installation-problems.html

System Requirement :

https://helpx.adobe.com/in/creative-cloud/system-requirements.html

Thanks

Uninstall all of it ASAP. In fact do NOT Buy your So Called Friends PC.  Buy a New computer.

If that is not an option, IE buying a new computer, then WIPE, Format, the drive that is on your Friends computer and reinstall the OS and legitimate, Licensed, software that may come with it.

None of which will be Adobe software.

You are wise to be concerned, and wise to ask. Yes you can expect serious problems.Cracked software often contains malware and you could never be sure it was gone. Uninstallers for cracked software don't remove the secret stuff! I strongly advise you to wipe the disk and reinstall the system. (This also gives you the chance to confirm that the Windows disks are genuine).