I need to replace a Hard Drive - how do I reinstall Wndows 7 OS

[computrix]

I also called Western Digital and they could not help at all they said I must call HP to ask what drives re compatible with this computer

[computrix]

One of the cables does fit but the other one with the pins do not and as I said Westren Digital could not help they said I must ontact HP

[computrix]

The smaller connector on the drive you told me to get has a double row of pins, the current one I have has a single row of pins so they do not match the bigger flat black one does connect

[Paul_Tikkanen]

Isn't there a black connector on a power line that can connect to to the hard drive?

Like I wrote...that makes no sense.

I have owned HP PC's for years and they all have black sata power connectors and I have been able to install any brand desktop sata drive I wanted.

You use the L-shaped connectors.  Nothing connects to the rows of pins.

[computrix]

Yes the black connector does work but the one on the right as I said before has a double row of 4 pins whereas the current connector has a single row of pins

[computrix]

The new drive is on the left and the existing one on the right, I have circled the connectors that are different so you can see they do not match

[Paul_Tikkanen]

Nothing goes in those pins.

You connect the power and data cables to those slot looking things on the left.

Here's the service manual for your PC.

Look at the illustration on page 6, # 3.

http://h10032.www1.hp.com/ctg/Manual/c02871896

[computrix]

The existing drive did have a black existing cable that does connect to those pins,  plus it had the bigge flat one,   I know I disconnected them both when I removed the existing drive. The existing drive had two cables connected on was the flat one and the other one a black for those 4 pins

[computrix]

That is not the correct manual or PC this is my one : https://support.hp.com/us-en/product/hp-pavilion-hpe-h8-1100-desktop-pc-series/5146418/model/5155343...

And as you can see from the picture ( Figure 2 )  the SATA data cable is the one that is different on the WD to the current one in the computer ( Seagate )

What do I do now ? 

[Paul_Tikkanen]

The picture in figure 2 is what I have always seen.  Larger black power connector to the left and the smaller black data connector to the right.

You can just get a different sata data cable then, and that would plug into the same port on the motherboard and the other end plugs into the smaller slot next to where the power connector goes.

If yours is what is pictured in figure 3, then you can get a molex to sata power adapter.