I have good news for you this time: this functionality is possible by setting up a Photo Stream on iCloud. The only downside to this method is that you will need to back up your Photo Stream every once in a while.
Follow these set up instructions, and then use this troubleshooting guide and FAQ page if you have any follow-up questions. The set-up instructions are comprehensive, but I've summarized the steps below:
- On your iPhone, in your settings, tap
iCloud > Photo Stream, then switch
My Photo Stream on.
- On your PC, open your iCloud Control Panel, then check the
Photo Stream checkbox, then click the
Photo Stream was reworded to
Photos between iOS 6 and iOS 7; same for Windows 7 and Windows 8.
Now, to directly answer your concern about deletions, this deletions guide explains how to delete photos from the Photo Stream depending on what device you want to delete them from. Below I've summarized the relevant pieces of information:
Note: The following assumes you have iCloud Control Panel 3.1 for Windows, iOS 7, and Windows 7; if you have other specs, refer to the entire deletions guide link above.
Delete photos from iPhone
- Open the Photos app, then tap
Albums > My Photo Stream > Select, then tap one or more photos, and then tap the Trash icon. Then confirm the number of deleted photos by tapping the
Delete N Photos dialog box, where
N is the number of photos your checked to delete. The changes should then be reflected once you view your Photo Stream on your PC.
Delete photos from PC
- Open a Windows Explorer window, and select
Favorites in the side panel. Then double-click
My Photo Stream to open it, and then select the photo or photos you want to delete. Right-click and select
Delete. The changes should then be reflected once you view your Photo Stream on your iPhone.
Once again, to confirm, I asked an Apple Support rep the following question:
I want to use iCloud to do two-way photo synchronization between iPhone to PC so that when I sync photos from my iPhone to my PC, I can edit/delete them on my PC, and then have those edits/deletions be reflected automatically on my iPhone.
The response I got was the following:
Two-way photo syncing is possible using Photo Stream between iPhone and PC.
In case you ever do switch to a Mac, I believe two-way syncing is also possible between an iPhone and a Mac computer.
Lastly, you must occasionally archive and back up your Photo Stream
As specified in the FAQ page (linked above):
The photos on iCloud via My Photo Stream are only available for download for 30 days.
This is because your Photo Stream storage is separate from your iCloud storage. Therefore, you must archive your data to back it up permanently. The instructions for archiving and backing up are a bit long to get through, but hopefully it will be worthwhile in the long run.