Issues with Macbook 13 inch (Mid 2010)

Question

So I have been having issues with my Macbook. It has been going on for a week now.. Mostly Youtube is the issue. Some videos will work and some wont. I have updated all the software updates. Firefox, computer update, adobe flash, silverlight. ect. None semed to work. I also downloaded the new OS Mavericks software but since I have 2GB its going slower. My laptop is an older version as well. I have the 10.9.3 version right now. I went to the Apple store yesturday and it seemed fine there, but when I got back home it started again.  I kind of want to uninstall the new Mavericks but I'm afraid I will delete all my files and such. If anyone can throughly tell me how to do that, that would be greatly appreciated. Also before doing that I want to uninstall Firefox and I thought I did but when I pull it out of my trash everything is still there and doesnt ask me to intall. If anyone knows how to fix any or all of this please help me. I am not good with this techy stuff!!

Answer 1

The Genius bar or specialists there are on staff and on payroll
so they can suggest a course of action, and diagnose the slow
action of the computer.
Take along your Snow Leopard 10.6 or maybe they can re-install
from their own tech discs the former version of 10.6 but without
your old Snow Leopard applications that came with the MacBook.
Since people here who answer inquiries are not Apple staff and
do not represent Apple Inc, it should be clear that some of us
who volunteer are owners and users of their product but are not
and do not have an affiliation with Apple. This is a user-to-user
discussion help forum; and you can ask as many questions as
you like & in different sections if you have different things to say.
Had you posted in the Mavericks 10.9 area, for example, and said
"How do I revert my Mavericks mid-2010 MacBook to Snow Leopard"
that would be front exposure to people who focus on or know more
about a new latest OS X than a MacBook series (2006 to 2010) era.
Did you re-install Adobe Flash player in your system, and get it to
work past Gatekeeper's watchful security? There is a way to do it.
Anyway, once you revert to Snow Leopard 10.6.8 you could then run
any older applications you had from that era, including some that
will not run in Mavericks or any system past Snow Leopard.
If you have the original grey-label install restore DVD set that came
with your MacBook, that would be the ideal way to revert the OS X.
An "erase and install" should do nicely if you don't want any of the
things you did in Mavericks to survive... Then update to 10.6.8 combo.
Then run Software Update again. Also, then get a Flash player for it.
{You could ask a question directed to Carolyn, or others; I will ignore it.}
Good luck & happy computing!
edited