Computer Won't Hibernate

I have a sony vaio running windows xp home. Not exactly sure when this
issue started, but just recently I noticed my computer will not hibernate. I
click on the hibernate button then the system goes to the "preparing to
hibernate screen" briefly then goes back to the normal windows screen.
Also, the computer won't hibernate on its own if the power management
properties are set for it to go into hibernation after so long.
The computer will go into standby mode fine. I have run updated versions of
spybot and adaware and both say my system is clean.
Any ideas would be greatly appreciated.

I'm running XP

This fix may work for you.
The hybrid sleep feature and the hibernation feature in Windows Vista may
become unavailable after you use the Disk Cleanup Tool :
http://support.microsoft.com/kb/928897

You probably have a corrupt copy of the 'C:\hiberfil.sys' file

One is created each time you hibernate. You probably need to turn off
hibernation, restart, and turn it back on. See Power Options in control
panel.

[TonyAguas]

I am having the same problem. Hibernate was working fine. I use it all of the time. I have run virus scans and found some. They have been removed. I have attempted resetting hibernate using these instructions, but it didn't work. Do you have any other ideas about clearing this issue up?

System Info:
HP Pavilion DV-8000
Windows XP (ver 2002, Svc Pk 3)

[Bratty57]

I had the same problem but just fixed it. It was a piece of software called bonjour, it wasn't it the add/remove part but was under the services. I just disabled that, stopped the service and now, all is good.

If you don't have bonjour, I suggest you control, alt, delete, to pull up task manager, and under processes, look through them and do a google search on ones you have no idea what they are. Some times it gonna take a little elbow grease till you find out what the problem is.