I have Widows XP Home installed on my computer.Recently I have been trying to install updates that windows send me a reminder of.The update in Question is Service Pack 3.Each time I try to install it the computer will only operate in safe mode as it will not boot up and I keep getting the message Entering Sleep Mode.I then have to revert to an earlier date when the computer was working.

Appreciate any help.Please keep any replies simple as I have a little knowledge which is definately a dangerous thing.

Thank You
Tony Jenkins