Usually the upgrade to Windows 10 from a Windows 7/8/8.1 PC is very easy, especially if this update is done because suggested by the Windows update feature.

Different is the case you have to update it from a Windows enterprise edition, maybe using an MSDN downloaded installer.
First of all, you must download the Windows 10 installer of the same version and language (as already posted here), then I suggest to disconnect – during the installation – all USB devices and possibly the network too. Migrating some labs PC we got the 0xC1900101-0x2000C error just for this reason!!!

May be you could have to update the BIOS of your PC before doing the installation, so please check in the page realted to your PC model if some updates are available …

You can have a look also to this post in the Windows Community forum where you can find several possible solutions to this error.