Hi all,
I never normally post but this issue took me a good 4 hours to resolve....
I was on a solid 50Mbp line on speedtest.net installed windows 7 (previously Vista) and went down to 6Mbp and really laggy ping spikes.
Everyone told me it was the isp but from reading this post I knew it was windows 7 and refused to give up.
Tried all of the above fixes from cmd commands / audio fixes / Graphical Fixes / antivirus fixes / bandwith reservation.. / disabling IPV6 and so on.....
All had a slight but mimimal effect but did not fix it.
The last thing I tried was updating my routers Firmware and it fixed the issue.
Im no tech expert but can safley say that there is a diffrence in the windows 7 internet code / settings.
For info router was a NetGear Wireless N Router
So as a first priority before installing windows 7
a) make sure you download your modem / router
drivers
b) update your router settings.
Hope this helps.