Cannot run video without buffer interferring

Everytime I run a UTUBE video, for example, the buffer keeps going around and
have to wait till it resumes. This is maddening. I have tried to reduce the buffer size, checked my flash program and it is up to date. I even reduce the buffer size to 280 and stils stops. Looks like either buffer too small or too big. Have tried
reducing and increasing buffer size and nothing happens.

I am on windows 7, 64k, and plenty of memory.

Would appreciate any assistance. Have tried some different sites.

Thank you.

Mary C. Lydon