The first picture looks like you either are using some weird codepage (are those symbols something you recognise - it certainly doesn't look like digits and special characters to me - but perhaps they mean something in some language I don't know).
If it's a codepage setting, then you can fix it. If it's some general corruption, I guess a re-install of the OS would help. Or if you can figure out which font it is, copy the font definition from some other system to your machine.
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Mats
