Bad lag after patch.

Before the latest patch, I had perfect ping and almost never lagged.
Now I can't even stay in a game for more than 10 seconds without freaking out because the lag is so bad.
I've deleted almost half my program files, so there's almost no clutter, and it still lags.
Any suggestions?

Alright, I'll give you a step by step tutorial.

Step 1:

Grab a pitch fork.

Step 2: Shove it up your ass.


Step 3: Get a better computer instead of the one you got for 3 coupons at E-mart.