If its easy mode install, it will be sql 2014 express and IIS express... so there will most likely be issues. If its advanced install, it would most likely be SQL full version of some sorts and hopefully full version of IIS... and you would have better luck then. Fortunately, there are configuration reset tools if your IIS site loses access to the database, etc. I wouldn't try upgrading the express install, I'd migrate to full first. There are instructions for that, im just on my mobile