Orange Box Update fucked over my games.

Here’s my specs before we start.
Processor: Pentium® Dual-Core CPU E5300 @ 2.60GHz (2 CPUs), ~2.6GHz
Memory: 4096MB RAM
Hard Drive: 733 GB
Video Card: NVIDIA GeForce 7050 / NVIDIA nForce 620i

Before the update my games, (Gmod, L4D, Ep2, Portal, CS:S) ran smoothly. Now after the update my games are really laggy, I’ve set everything on low and it still lags. Suggestions would be helpful.

[editline]08:44PM[/editline]

Help

bump

Run the game in fullscreen on the lowest resolution.

Other that that there is no good solution rather than upgrading.

Portal and EP2 has always been OB engine.