Keep in mind Youtube downloader often have malware.

https://www.google.com/search?q=80200010 finds plenty of prior discussions but since you have a Youtube downloader I fear there is something extra in the machine.

Try Grif's advice since scans will take some time. Use that time to read other complaints about that error code.

Here's Grif -> http://forums.cnet.com/7726-6132_102-5098912.html?tag=posts;msg5099421

And you bring up a great question such as, isn't it about time Microsoft fix these update errors? It's just a download of a bunch of bits. So what if the internet drops out. Pick up where you left off (that's to MSFT, not you.)
Bob