Automatic Power Management (APM) not working due to BIOS or network adapter.
Cause:
The BIOS may be outdated or the computer may contain a real mode network adapter driver. Windows 95 does not accept APM if an NDIS 2 (real mode) network driver is installed.
Solution:
Make sure the BIOS is up-to-date and that the network adapter card driver is a protected mode driver.
Do one or both of the following:
1) Contact your BIOS manufacturer to obtain an updated BIOS for the computer.
2) If the computer contains a network adapter, make sure the driver is a protected mode driver (NDIS 3.1) and not a real mode driver (NDIS 2):
a) Right-click on 'Network Neighborhood'.
'Network Neighborhood'
b) Select 'Properties' from the pop-up menu. (The 'Network' dialog box appears.)
c) Select the network card installed on the computer from 'The following network components are installed' list box.
'Network' dialog box
d) Click 'Properties'. (The <Network Card> dialog box appears, where <Network Card> indicates the type of card installed.)
e) Click the 'Driver Type' tab.
f) Make sure the 'Enhanced mode (32-bit and 16-bit) NDIS driver' radio button is selected.
32-bit driver
NOTE: If the enhanced mode option is not selected or is unavailable, contact a manufacturer to obtain a protected mode network adapter card and driver.
g) Click 'OK' to close the <Network Card> dialog box. (The 'Network' dialog box reappears.)
h) Click 'OK' to close the 'Network' dialog box.