I have been helping a coworker with a computer that lags sometimes at start-up, using windows xp professional. Checking the computer I found out that there was a missing driver, an ethernet controller driver and there is no way I can get a suitable driver that installs in that system. I tried using several programs such as drivermax, double driver, Driver Whiz, etc with no luck. This is an ASUS desktop computer with a Pentium 4 2.4 GHZ processor and Asrock Model GE pro M2 motherboard. I ran the Everest software and apparently the missing drivers are Ralink RT 2500 802.11 g wireless network adapter for wireless and SIS 900 fast ethernet adapter (Phy: Realtek RTL8201/L/BL. Any help will be appreciated in trying to install these drivers.