Aspire 1640 Driver For Windows XP
Foxcom Modem Driver
Version : 7.31.0
Category : Modem Driver
Operating System : Windows XP
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Intel Chipset
Version : 6.3.0.1007
Category : Chipset Driver
Operating System : Windows XP
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Intel VGA Driver
Version : 6.14.10.4332
Category : VGA Driver
Operating System : Windows XP
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Realtek Audio Driver
Version : 5.10.0.5148
Category : Audio/sound Driver
Operating System : Windows XP
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Realtek LAN Driver
Version : 5.621.304.2005
Category : LAN Driver
Operating System : Windows XP
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TouchPad Driver
Version : 7.12.3
Category : TouchPAD Driver
Operating System : Windows XP
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WLAN 802.11 (Atheros) Driver
Version : 4.0.0.14001
Category : WLAN Driver
Operating System : Windows XP
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Version : 9.0.1.9.
Category : WLAN Driver
Operating System : Windows XP
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driver source originally taken from: http://www.laptopbeep.com/aspire-1640-driver-for-windows-xp
I can,t still find vista driver but you can get the latest update at the acer official support site.
http://www.acer.com.my/