Mouse delay and OpenGL games delay. Help!

[yro]

Hi there.

Im running Windows 7 Professional x86 final on this machine:
athlon x2 5.000+
2x2gb ddr800 dual-channel memory
ati radeon hd 4650 512mb 128bits
500g sata hd

The os is updated and all the settings of the os are on default. The settings of videocard are in performance/balanced.

The problem was found in counter-strike 1.6 and Urban Terror 4.1 (its a quake3 mod).

In desktop, without gamming or something else, i see that the mouse has some kind of delay (almost nothing here).

During the gameplay i get lag and slow fps...

I desabled the "DESKTOP COMPOSITION" and the problem was not solved but its better with this crap disabled.

I wanna know if you can tell me if there is some config, drive issue, or something else to make it works without this option disabled.

Im thinking in some option on regedit to make desktop composition stop lagging the opengl games.

Does anybody knows how to solve it without disabling the desktop composition?

I like the face of windows 7 and dont wanna loose it for a game too old.


Sorry about my english.

 

[yro]

One more thing...

I noticed some people sayng that this problem can be fixed changing the video options from opengl to d3d.

Where and how to do that?