It's not as pretty to look at, but
see the archives here
With a bit of Google-fu you can search it.....
Code:
site:pprune.org inurl:archive your_search_params_here
Or, in an attempt to ensure you only get C&I results....
Code:
site:www.pprune.org inurl:archive intext:"Computer/Internet Issues & Troubleshooting" your_search_params_here