Thanks-just noticed you have 2 drives in your build. 1 drive is the SSD and the other drive is an HDD.
You should never attempt installing any Windows OS with multiple storage drives plugged into your Mobo ports, that includes USB drives and peripherals such as printers, webcams, NAS, etc. I would also suspect that the ISO file the Tech gave you may not be good. Lots of techs burn stuff either discs or USB sticks to get you out of their hair (unless he's a personal friend or family member!), and they never bother to check their work!

Seen it happen at just about every major computer store chain--especially since I used to train techs for Best Buy & Staples.
First thing I would do is detach all devices plugged into that Mobo except either your SSD or your HDD, whichever you prefer to have your W7 installed on. Reattempt the W7 install. It should now work!

Lots of folks whether they are self-builders or OEM users (Dell, HP, Acer) forget about this simple rule, or if they are NOT real tech savvy or went through repair training simply are not aware of it. Neem's suggestions should work once you fix this problem.
If they don't there are 3 likely possibilities:
1.) Whichever drive you are using for your boot drive has failed, and that's why the W7 installation fails. You need to test that bootdrive using the instructions at this link:
Link Removed and test your drive.
2.) The ISO file the Tech used was corrupted or he burned the USB stick incorrectly, or you did.
3.) The ISO file the Tech used or gave you was OK, but you have 1 or more sticks of failed RAM, so you need to test your RAM sticks using instructions from here:
Link Removed
If no hardware failures are found, or if found you replaced the bad drive or RAM sticks and then got the drive and memory tests to pass, that should produce a fix. If it doesn't, it's possible your BIOS settings have gotten scrambled, and a BIOS backup and reset would then be recommended. However, this is quite High-Risk and if you've never done it before, you are better off paying a licensed Tech to do for you since if you mess it up, it can bork your Mobo and that's a very expensive replacement or repair especially if your Mobo is out of Warranty so the repair is all out of your pocket!
Let us know how it goes.
Best,
<<<BBJ>>> 