FPS issues

So I used to get constant 99.5 or 100.5 fps till like a month ago. Then I got a driver update for my GPU 940mx (its not a gaming laptop) and the steam update too a while ago. Since then my fps keeps fluctuating from 100 to 90s to even 80s sometimes, and it's just way harder to strafe or play kz/hns cuz the game kinda feels like it's running in slowmo iykwim? Any solutions.
Ps: my vsync is off, laptop turned to high performance in power settings. I used these two to fix my fps issues earlier but they ain't working anymore.
Also, I downgraded my driver back to the one which gave me 100 fps but still it's not working. Please help

i had same issue in my asus laptop and i've done some fixes and now my fps is constant only my lan. when i join public server it starts fluctuating
wat i've changed is : i lowered the power consommation by the processer from 100% to 60% (u can find this in power management option).
also to get constant fps in lan i have to open cs and close until i find constant fps by luck (usualy 2,3 times).
i duno what to do i think a have virus in my pc. I also asked a friend who play cs in laptop and told me laptop are shity for gaming it cant handle long periode with good quality.
i miss my old pc (bureautique) its fuking old 1gb nvidia, 2gb ram but fps never drops by 1 frame in any fuking map for hours.

usually laptops have 2 video cards, check in Nvidia control panel that hl.exe is set to run on Nvidia card. Also turn off / to minimum all video settings for cs, in Nvidia control panel.

@MGP I'm not sure if I know what you mean exactly, so any link or tutorial as to how it can be done?
@fuerza I get good FPS on LAN, not many issues there, but when I join online servers, FPS starts acting up.