If I follow correctly you are seeing pop-up ads offering software fixes, driver updates, etc. for your computer.
Best to just ignore such things. Only download drivers and updates directly from the manufacturer's website. Even then you must be careful as some of them even try to add or install other stuff that is probably not relevant or needed.
There is no one site per se but Wikipedia is as good a start as any. But Wikipedia should not be considered as the final answer - look for other explanations as well.
If some language you "do not comprehend" appears just copy the words by highlighting and using CTRL + C. Then go into your browser and search engine of choice.
Use CTRL + V to paste in the copied language and run a...