I hate to be the one to tell you ... but no amount of parental control software from Microsoft or anyone else is going to give you the filtering your daughters deserve.
The problem is: Content providers really don't give a cr@p about what our children are exposed to. No parental control software can overcome that. There's no money in keeping our kids safe.
While there is a lot you can do to keep the worst away from your daughters, the most effective parental control comes from being in the same room as your daughters when the computer is on.
For your 5-year old, you can use an overlay like Magic Desktop and other products like it. Your 8-year old is starting to age out of that, depending on what her friends have. The years between 8 and 14 will be toughest, since your girls will bristle at anything that interferes with what their friends
are watching. Being an active parent will help a lot, since it is ultimately the judgement and confidence they learn from you that will keep them healthy.
The best way to keep the worst from your daughters is with a filtering DNS service. That will prevent objectionable websites from reaching your computer in the first place, but you'll have to keep two things in mind:
- Websites are either banned or not. It's either everything in YouTube or no YouTube at all.
- This will prevent banned websites from reaching your modem, so you won't be able to see them either.
If you're interested in how this works, I can explain further. One great example of a DNS filtering service is
OpenDNS from Cisco, and it's a free service.