| Name | Architecture | Publisher | Release Year | File Location | File Type | Notes |
|---|---|---|---|---|---|---|
| Windows 98 Second Edition Beta | x86 | Microsoft | 1999 | /image-files/win-dos/98/iso/beta/ | ISO CD Image | none |
| Windows Longhorn (Vista Beta) | x86_64 | Microsoft | 2005 | /image-files/win-nt/betas/iso/longhorn/ | ISO DVD Image | none |
| Windows Nashville | x86 | Microsoft | 1996 | /image-files/win-nt/betas/iso/nashville/ | ISO CD Image | none |
| Windows Neptune (Cancelled 2000 Version) | x86 | Microsoft | 1999 | /image-files/win-nt/betas/iso/neptune/ | ISO CD Image | none |
| Windows Whistler (XP Beta) | x86 | Microsoft | 2002 | /image-files/win-nt/betas/iso/whistler/ | ISO CD Image | none |