i am using a medion laptop 1.8ghz 128ram xp home. i reformatted the hard drive and can longer put it into standby or it wont enter standby when i close the lid. any help, medion helpline is useless

In order for Stand By / Hibernate / Low Power mode, all of you hardware drivers have to support it.

Sounds like you had all the correct hardware drivers but when you re-installed, there using "default" generic drivers that don't support this option.

I would go to the manufacturer of your laptop web site and download all of the hardware drivers and install of them for your laptop. This should get power management to work again.