youtubes videos are not playing well with full screen!

[farhad123]

hi!
first of all, i tried my best to get the solution of my problem by going thorough different topic but none of them, i found helpful so i decided to make my very own thread!

first i was using windows Xp and it was working absolutely fine with not even a single problem. i was totally happy with it but then What the bad time it was when i heard about this windows 7 and tried to use it!
here starts the messes, i manage to solved them completely and somehow got succeed in it expect this one.
i installed all the drivers and new latest flash player but still the problem is that the video is playing but it is very lag... it's not working as smoothly as worked in windows xp. i want to get rid of this problem
currently i'm using firefox, but i tried all the browsers getting same result with all.
please help me solve the problem other wise there is no option but to go back to WIN Xp again.
here are my system's details:
Processor Intel(R) Pentium(R) 4 CPU 2.66GHz, 2660 Mhz, 1 Core(s), 1 Logical Processor(s)
BIOS Version/Date Dell Inc. A03, 9/17/2004'
System Model OptiPlex GX280
System Type X86-based PC
Installed Physical Memory (RAM) 1 GB

Display details:
Name Intel(R) 82915G/GV/910GL Express Chipset Family
Adapter Description Intel(R) 82915G/GV/910GL Express Chipset Family
Adapter Type Not Available, Intel Corporation compatible

before, i finish this thread i want to make you see the snap of my DXIDAG windows , on which i'm highly suspected...if there's any problem related to it please help me thanks!

Please help me as soon as possible!!!

 

[zigzag3143]

Your computer barely meets the minimum requirements for win 7. I suspect that coupled with a slow network connection may be the issue.