If your computer doesn't support Adobe Flash player and will not upgrade, All I can suggest is that you try Chrome as it has an built in Flash and is higher version than Linux can use other wise. If you can't get that, I strongly suggest you upgrade your computer, or stop using a Tablet.
If it's family computer and you are on a restricted account. Windows Vista, 7 and possibly 8, can allow the owner to let other users install stuff.
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