I'm Using windows XP SP1. When I installed it on computer I could able to standby computer. But after I installed some software, stand by button changed as disable. But i couldn't identify that particular software for this fault. Can I enable this standby button again without reinstalling windows?
First make sure that the Hibernation is turned on. Click Start > Control Panel > Power Options > Hibernate tab > check Enable hibernate support box > Apply/OK and then restart you computer. If this doesnt solve it: In your BIOS, you should check to see if the ACPI/APM option is enabled. If it was disabled, enable it and follow the steps at the top.