The first thing you should do with a PC is to delete all partitions and install a fresh OS. Even if you aren't installing Linux, you should download untampered Windows 10 (the same edition that the PC came licensed for) from Microsoft and do a fresh install without OEMware.
Or make sure you buy a "Signature Edition" PC in the first place, which is Microsoft's program for "junk free" systems [1] you can find in Microsoft Stores or if you ask the right Best Buy or office store.
