Setup was unable to create a new system partition

I asked you how exactlly you created the stick.

Set the IDEO Seagate hard drive as first boot device. Save changes and exit.

Now plug in the stick, reboot and tap the F12 key to get the Acer Boot Menu. If the stick is done correctly it should show up probably under USB HD Flash Stick, but may be listed under another HD requiring expanding the listing to see it, or be listed under USB or Removable. Normally the name of the stick also appears.

If the stick doesn't appear download a new ISO for your licensed version Win7 Home Premium x64 SP1 English Official ISO download and write the stick again using UltraISO Software To Create Bootable USB Flash Drive making sure to use the Format button before Write.

Then look for the stick again under the F12 Boot Menu.

If it doesn't show up then enter BIOS setup again and check settings for USB on all tabs - there will be multiple tabs across the top to click on.

Is that IDE0 or IDE1? I have just tried both and then hit F12 repeatedly upon rebooting. it seems to do nothing. Are you sure it's F12 i should be hitting. F2 is what got up the menu I screenshot above.

Never mind I got F12 to work. Here is what it looks like. Does this mean my USB isn't done correctly so? I will try to do it again with the iso link you provided.

and sorry, I'm not up to speed with the language. Is the BIOS menu the one I posted in the first screenshot?? or if not, do you know how to access it on my machine? Acer aspire 5734z, thanks

Think its working now! Thanks so much. Lifesaver :) hope nothing goes wrong again!

Did it install? Be sure to follow the steps in Clean Reinstall - Factory OEM Windows 7
to set up and maintain your install.

The BIOS Boot Priority menu shown in your first screenshots should have the hard drive IDE0 set first to boot, then you should trigger the stick using F12 key to get a one-time BIOS Boot menu. This prevents the stick from auto starting over again during reboots during the install.

But if you must use the F2 menu to set the stick first because F12 is not working, then if it tries to start over during reboot just unplug the stick.

Yes it installed. Got a heap of new problems now but nothing I can't manage. Thanks again!

So are you following the steps in tutorial to get a perfect install, or do you want another kind of install?

If you'd like our help, just ask back.

Let us also see a screenshot of Disk Management - Post a Screen Capture Image

It seems to be okay now! Thanks :)

A friend of mine bought a Toshiba Satellite (im not sure of the model number) laptop, and asked me to help him format the currently installed Windows 8 and install Windows 7 Ultimate x64 on it. The disk size is 495 GB. The problem was that the laptop wasn't booting up from the dvd, so i tried installing Win 7 from the usb. The setup didn't boot from the usb either.
In order to boot the setup from either the usb or dvd, i disabled secureboot and changed uefi to mbr in bios.
After i did that, i booted the setup from the dvd. I followed everything hArLtRoN suggested , and now i have one partition, named C: , 495 GB in size which has the word "System" written in the type column. However, when i try to start installing Windows 7 on that partition, it says that there is no system partition found/it's missing.
Also, when i restarted the laptop, a " mbr missing press ctrl alt del " appeared, when i put the usb back into the laptop, the setup booted again. (I'm not sure if it booted because of the usb, but it seems that way). The same system partition missing problem is there again though. Any kind of help would be welcome, and sorry for the long text :).