Problems in the interface and background colors in Libreoffice calc

Hello, I have an Asus F550C Windows 8 64 bits and I have several problems with the interface, the files conversion and background colors.

I have redownloaded the Libreoffice program and the problem remains.

Can someone help me please?

Thank you.

Please edit your question to provide specific details of what the problems are (or at least list a few examples) in terms of expected and observed behaviour. Also indicate if you are using a theme in Windows and the LO version you are using. Thanks.