I can’t seem to download the Windows 7 64bit RC file that you provided. I get a blank page when I open it on firefox and I get greeted with a page that says “This domain has just been registered” when I open it on internet explorer.
Also, rufus doesn’t seem to recognise my USB stick.
Here’s the log:

Found device ‘HP v120w USB Device’
Could not open ‘\?\usbstor#disk&ven_hp&prod_v120w&rev_0.00#9ef52eb5ce2678&0#{53f56307-b6bf-11d0-94f2-00a0c91efb8b}’: [0x00000005] Access is denied.
A device was eliminated because it didn’t report itself as a non fixed USB disk
0 devices found.

Would it be possible for me to just copy FRST64 to my USB and access Command Prompt through my Windows 7 disk?