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I was experiencing some issues with my connection while playing online and I tried to optimize it by running TCP optimizer on my PC (Windows 7 64bit professional). I thought maybe the situation could improve. but it didn't.

actually, I now get an extremely slow page loading time, probably due to a very low RWIN value of 1024. I understand that Windows 7 has a system to automatically adjust the RWIN value when needed. The setting from netsh is "normal" so I guess something else must be wrong.

I tried every automatic tool out there to restore Windows' default values, but I had no success. I currently have what should be labeled as "default values" for everything TCP Optimizer initially changed, but the problem persists.

The thing is, I just found out that running Windows in safe mode SOLVES the problem completely. The problem is that as soon as I reboot, I get the same issue all over again.

So my question is: is there a way to use SAFE MODE network settings in NORMAL mode?

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Try running the following command in an elevated command prompt (right click "Command Prompt", choose Run As Administrator):

netsh winsock reset

If that doesn't work, try restoring to a date before you ran the optimizer using System Restore.


I found some more ideas. Try running the following command in an elevated command prompt:

netsh int ip reset

followed by netsh winsock reset, then reboot.

If you still have issues, try:

netsh int tcp set global autotuninglevel=Normal
netsh int tcp set global congestionprovider=default
netsh int tcp set heuristics default
netsh int tcp set global ecncapability=default
netsh int tcp set global dca=disabled 

Also check this link for ideas to get your speed up once you get your system running properly (mostly router tweaks)

share|improve this answer
Thanks. I've just tried it, but it didn't work. I had already tried system restore, luckily I had a restore point from yesterday, but nothing changes (except I have to reinstall an adobe flash update :-( ) – michele Apr 25 '11 at 20:15
I just updated my answer with some more information I found. – TuxRug Apr 27 '11 at 3:14

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