Can not log into facebook. it come up on laptop but not on PC

If the pc is not the usual device you log in to fb on, it may not allow you to access your account because it is from an unknown device. This is a security measure designed to prevent your account from being hacked. If this is the case, you will receive an email with further instruction's.

Try a different browser like Firefox or Google Chrome you can get them INSTALLED at:

Ninite Install or Update Multiple Apps at Once