just bought a 22inch LCD and everything was going fine. Connected it via VGA and set it to the native res (1680 X1050) with a crappy old vid card NVIDIA 64mb (i think) Geforce2 MX 100/200.
Problem #1:
i installed an antivirus program and had it run a system scan after a restart. after loging back in i noticed the res changed. tried to re-set it but couldnt find the native res in the settings. i was like WTF did it go? i updated the drivers but still couldnt find it. i still dont know how to get it back in the settings. i read somewhere that i could add it through customizing it, but i dont know how to do that. Im just hanging on by setting it through the closest res which is (1600 X 1200) and using the auto adjust feature.
Problem #2:
after that i started noticing a couple of columns filled with horizontal lines on the screen. i have no idea how or why this is happening. i dunno if its my video card or the lcd which is f@cked up.
pics of monitor:
pic 1:

pic2:
If anyone can help me understand whats going on, i would appreciate it. Is it the monitor or video card? I already tried to update the video card's driver. Thanx alot for any help! if i missed any spec, ill gladly post it.
specs:
vidcard-NVIDIA 64mb (i think) Geforce2 MX 100/200.
OS- winxp
RAM- 2g SDRAM
power- 300 or 350
monitor- X2gen 22" Wide
5ms 1000:1 500 cd/m²
1680 x 1050 WSXGA+