It sounds like your profile is corrupt, your question implies you have Windows 8.

Unfortunately with the new OS's, it is not straightforward to create another profile, as you need to modify a registry key as well, which unless you are comfortable doing, has potential for serious damage.

I can tell you how to rename your profile and make the change to the registry if you are comfortable doing this?

Alternatively you could create a new account, but then you obviously this will not have your data, both achieve the same end result, but the latter is easier and your data can then be transferred...

Martin