Sentence:  Sometimes Windows system files get messed up (the technical term is "<WSD>borked</WSD>"). In those cases, Microsoft has a program called "Refresh" that scans and fixes all the system files, without changing your settings, removing any installed programs, or blasting your data. 
Meaning of the word marked with <WSD> tags:  To become broken or damaged, "especially" of a computer or other complex device.