It looks that my windows 7 doesn' like TF2

Have you tried killing absolutely all processes (while keeping windows alive) and checking if it does any difference? Also look up for some tools for logging cpu/network/hdd usage (or if possible overlay over tf2). See if anything spikes while lag happens. Also check if you're not getting any loss and/or choke (net_graph 3).
Also is your broadband configurable?

Mine for example I can set up for gaming (which lowers the ping) or for something else (which increase the speed). While the ping option works it makes TF2 choppy, so I'm on the second setting which gets my ping in between 25-60 (as opposed to 15-25) but game run smoothly.

The other thing I can think of is crappy congestion ratio on your broadband and when more people are using the internet your speed will jump up and down causing lag.

Sorry If it's been said before (thread too long - didn't read)

 

mmm ive been having some problems with tf2, my broadband has a gaming mode that is turned on, ill turn it off and see

 

i disabled almost all the processes which windows allowed me to , but it didn't help much
take a look at my demo a few posts before, maybe u know what's wrong with my performance

 

yes-nothing

 

start > run > cmd

ping -t www.google.com

 

ping is about 150 ms, but nothing wrong i think

dark ,thx for keep helping me but it still doesn't give any result

 

http://www.majorgeeks.com/Game_Booster_d5952.html

Also, make sure that your connection speed in steam is set to LAN or you will experience in-game connection issues.

 

Thanks for TuneUp dark. I forgot about it, probably cos i don't see any reason why Windows 7 needs it, but I'll give it a try. xD

 

thx geit, but fastjohn has already suggested to use it...

 

Time to buy new PC Bura.
Or new DSL connection or new Win7.

 

i never search the easy ways

 

yep it's William Fichtner, and the pic is from the dark knight movie

 

one of my favourite actors