Windows 7 to 10 forced update - my trusty old cs2 will not install - which version next ?

CS2 activation servers are dead.  There is no possible way to reinstall it now.

Depending on what you need, PS Elements might be what you're looking for.  It lacks all the bells & whistles of Photoshop CC but it's way better than CS2 from 2005 with a shorter learning curve.

ADOBE TOOLS:
===========
- Illustrator CC (vector): https://www.adobe.com/products/illustrator.html
- Photoshop Elements (raster): https://www.adobe.com/products/photoshop-elements.html
- Photoshop CC (raster): https://www.adobe.com/products/photoshop.html

OTHER TOOLS (raster & vector):
===========
- Affinity Photo & Affinity Designer: https://affinity.serif.com
- CorelDRAW Graphics Suite: https://www.coreldraw.com/
- GIMP: https://www.gimp.org/
- Gravit Designer: https://www.designer.io/en/
- Inkscape: https://inkscape.org/
- Krita: https://krita.org/
- Paint.NET: https://www.getpaint.net/
- PaintShop Pro: https://www.paintshoppro.com/
- PhotoPea: https://www.photopea.com/
- Photo Pos Pro: https://www.photopos.com/PPP3_BS/Default.aspx
- Pixlr: https://pixlr.com/
- Vctr: https://vectr.com/

Hope that helps.

Cloud Plans https://creative.adobe.com/plans

Special Photography Plan includes Photoshop & Lightroom & Bridge & Mobile Lightroom

You pay for a subscription as long as you want to use the program(s)

Photoshop Elements is a one time purchase

If you buy via download from Adobe you get ONE version, Mac or Windows

If you buy the DVD from Amazon you get both versions in the box

As @John T Smith says, you can get Photoshop Elements, which has more than enough capabilities to handle what you're doing and can be purchased either as a subscription or as a one-time upfront cost.

Or, if all you're doing is adding text and arrows and not actually editing the photographs, you can probably get away with a program like Snagit, which is a screen capture program with some editing capabilities. It's also able to work with JPGs. It's designed to add circles and arrows and text and is far, far cheaper than Photoshop.

2 choices... a subscription to Photoshop or Photoshop Elements http://www.adobe.com/products/elements-family.html