| Problem | Likely Cause | Solution | |---------|--------------|----------| | Tool says âISO is invalidâ | ISO not SP1 or corrupted | Use official Windows 7 SP1 ISO. | | USB still not working in setup | Wrong USB port | Use a USB 2.0 port if available. If not, try a different USB 3.0 port. | | Installation hangs at âStarting Windowsâ | Missing graphics or storage driver | Boot with CSM enabled; try a different SATA mode (AHCI, not RAID). | | âMissing media driverâ popup | Tool didnât inject drivers properly | Redo with ISO mode â use Rufus to write ISO, then manually load drivers from USB during setup. | | Setup cannot install on GPT drive | BIOS in UEFI mode, but USB made for MBR | Recreate USB with ISO mode + Rufus set to âGPT for UEFI.â |
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