Hi,
I am using Windows 8 and don't know my computer font has changed accidentally now it appears to be more kind of foggy?
its doesn't show clearly, like on folder name and file names and other things.
any helps?

You have to give us a complete description of your PC specs and which version of the Win 8 beta you installed, Win 8 CP or the updated Win 8 RP. Did you do an update install or a clean install? These questions need to be answered before we can try to help.

Try going to "view" on your tabs and then click zoom. from there, zoom out.

It is just not cool when an OP asks a question, then never returns to let us know what's happening.