Windows 7 cpu usage is super high when doing nothing

[pchelp]

Hello, I bought a restored hp elitebook 8460p with a core i5 processor and 16gb of ram, Recently the hard drive failed so i put a new one in, re installed windows 7 home premium 64 bit and downloaded all the drivers I could find and installed my programs, but now when my computer is just on the desktop with no open programs my cpu usage is at 25% and is using 4.5 gb of ram out of my 16gb!!! Just on the wifi typing this I'm using 5gb of ram. This causes the battery to go down very fast and recharge very slowly.
Does anybody have a solution to my problem???? thanks in advanced

 

[pchelp]

In the command prompt type net user <username> and verify you are a member of the administrators group

The syntax of the command is incorrect

 

[pchelp]

At this point i think i am going to try and reinstall windows to see if it makes a difference

 

[pchelp]

now my computer found the updates, i am going to download them first

 

[pchelp]

will tell you results

 

[pchelp]

yeah, the updates didnt do anything

 

[HenkB]

Try it until no new updates are found. There are updates on updates.....