I brought this all on myself, I fully admit. Circumstances led me to a very nasty place.
I have been an XP O/S user for years. I have Live OneCare doing my backups and never lost a file. I was fat and happy thinking I was protected.
Then my hard drive died and I went to Best Buy to get another SATA. The smallest one they had was 500 GB, so I bought it. Well, it turns out that XP won't natively handle an SATA that large. No problem, it comes with a CD. Well, it turns out XP won't let you use the CD drive during the installation step, the driver has to be on a floppy drive. A floppy drive? I haven't had a floppy on the last two machines I've built. So, I borrowed a USB floppy drive and manually download the drivers to the floppy drive on my work laptop. Well, it turns out my BIOS doesn't load USB floppy drives as A: during the boot-up process, so that didn't work.
Well, an IT guy at work suggested I just surrender to the flow and upgrade to an O/S created in this decade ... he handed me a copy of the Windows 7 Beta, Build 7100. That O/S will natively access the SATA drive I just bought. I actually thought I was making progress. That worked and I installed Office and configured Outlook ... downloaded my recent mail and realized I had none of my archived mail. Of course, I didn't! All those emails were backed-up by Live OneCare, compressed with an algorithm unknown to me. I'll just download Windows Live OneCare and use it to restore my stuff.
Well, it turns out that Windows 7 does not allow Window Live OneCare to be installed. The resolution? Don't do that. Yep, just don't get into a situation where you need to restore files that were compressed by Windows Live OneCare. Well, it turns out that I was already in that situation and couldn't avoid it.
Any ideas out there? You guys are tricky ... is there any hope for my data?
One Care backups are stored in standard zip files so you can use any zip utility to extract them. Some files may be split but you can download a utility to join them here - http://www.freebyte.com/hjsplit/
Jim - MVP Windows Live - Forum Moderator - Live One Care - Live Mesh - Microsoft Security Essentials