Vista - unable to find compatible graphics driver

hello,
i have an acer notebook aspire 4520.i changed my os to vista home premium 32bit coz the earlier os was corrupted.since then i have bin havin millions of problems.1st,i couldnt play any vista cmpatible game.it said to download the nvidia geforce 177.5 version n when i did and installed and then ,it said 'could not detect a compatibledriver on your hardware.
my system is;;
acer notebook aspire 4520
amd turion 64x2 mobile technology,tl56[1.8ghz,2x512kb l2cache]
upto 384 mb nvidia geforce 7000m turbocache
1 gb ddr2802.11 b/g wlan

also i couldnt find the compaible LAN driver for ethernet although i already downloaded from the acer website.nothing seems to be compatible...on top of that I HAVE LOST THE WINDOW INSTALLATION DISK.m really desperate man...pliz help!!!!!

Hi, david_howdi, and welcome to the forums.

Have you tried getting the latest available driver from Acer's website? A lot of laptop GPU drivers are like that - you can only use the drivers from your machine's manufacturer.