Portable apps often fail because they expect registry keys. You need to export these keys from the installed machine (regedit):
| Software | Portable | Batch Resize | Red-Eye | Free? | |----------|----------|--------------|---------|-------| | (with Plugins) | Yes | Yes | Yes | Free for non-commercial | | XnView Classic | Yes | Yes | Yes | Free for personal use | | FastStone Image Viewer | Yes | Yes | Yes | Free for home use | | GIMP Portable | Yes | Yes | Yes | Open source (steep learning curve) | | PhotoFiltre Studio | Yes | Limited | Yes | Paid (older free version exists) | download microsoft office picture manager 2007 portable
However, the reality is harsh: Your best options, ranked by safety and effort: Portable apps often fail because they expect registry keys