repair windows

Hi,

my computer is often giving me BSODs, about once every other day. I tried to follow any advice I found on the Internet but the situation remains unchanged. I am thinking to try one of those tools that the can repair windows and in particular, the registry. However I don’t trust these apps very much. Some are very expensive, some install a lot of craps that slows down the computer, some seem malware more than repair tools. However, I would be willing to try one if I get a trustworthy recommendation. Did anyone here use one of these apps and can recommend it’s use?

Thank you