Long wakeup from standby, power options not working

Sorry, I posted this on the software forum but got no reply, so I repost it here. Hopefully someone can help

My Lenovo Thinkpad X200s uses Windows XP Pro. It has two problems involving the power (I use it at home with AC power, not battery):

a) Recently, after going standby mode, when I needed to wake it up, it takes an unusually long time, more than 1 minute, to come out of the standby mode.

b) Since a long time ago (not aware when it started), the power options that I had set seem not to be working. E.g. I had set the machine to go standby and to turn off hard disk after 15 min being idle, but after hours (sometimes I was out all day expecting to come back to find its hard disk off), the machine was still on (video downloading apparently went on for a long time), not even in standby mode.

What could be the problem?

Thanks in advance for any help!

 

You might look through the Windows Update Modules and see if any of them apply to your problem. Note that many of these are installed with Windows Service Pack updates.

Lenovo Support - Drivers and software - ThinkPad X200, X200s, X200 Tablet

 

Thanks for the reply. I followed it and downloaded the power manager and power manager driver, it solved part of the problem: waking up from standby is quicker now, however the timed standby still doesn't work. Set the computer to go standby in 1, 3, 5 min, it didn't go. The only way is to manually let it go standby. The screen does turn off at the set time.

Any more tips? Could it have to do with XP, or Thinkpad?