I tested on other computer: no effect in speed ... And that darkplaces-thingy's site is very weird and it doesn't allow me to download from there ...

If that's the case I can patch it using 1.06 or 1.08, I have both.

Quake 1.01 unpatched WinXP Pro SP2

I got Quake running with DOSBox after had been altered the properties of Quake.exe using other site but it was running VEEEEEEEEEEEEEEEEEEERY slow, regardless of the amount of CPU cycles. I though that if I delete the whole Quake folder, I'd get it running at normal speed in DOSBox, however, this …