I have a similar issue on Windows XP, but my cpu does have SSE2 instructions.
Xeon 3070: https://ark.intel.com/products/27206/Intel-Xeon-Processor-3070-4M-Cache-2_66-GHz-1066-MHz-FSB
When I run 5.28, it runs through the cleaning process completely, but at the end, it crashes and closes. If I re-run it, it finds nothing to clean, so I know the cleaning occurred before the crash.
Where do I find previous versions to download? I use the portable version. I had skipped a bunch of versions (I was running 5.18 previously), so I don't have access to 5.27, 5.26, etc.