One of the specified disk images could not be opened

I cannot believe how instable my system is. I switched to Mac to get a reliable system, but I cannot do without Windows entirely, hence my heavy use of VPC.
Today I got the small grey screen "You need to restart your computer". I was running VPC at the time. All apps were closed except Windows Explorer (the file system). The cause was merely unplugging my broadband connection. Wow!
On rebooting VPC I got:
"One of the specified disk images could not be opened. The disk image file is not the correct file type or uses a file format that is unsupported by this version of Virtual PC."
I "detached" my "drives" 2+3, which were pointing to my Drive2.vhdp and Drive3.vhdp data "drives" and tried again. No luck.
Drive 1 was pointing to Disk1.vhdp, which is a part of my Windows 2000.vpc package. I don't believe that it was pointing there before the crash.
# side note #
(The Windows 2000.vpc package is an old installation that I don't use but have not deleted. I currently use one called: "Windows 2000 copy 1-011105") which might or might not be a copy of "Windows 2000.vpc." I've had so many problems, it's hard to say.
I then tried and successfully detached the Disk1.vhdp and received a warning:
"The hard drive data previously used by Drive 1 is no longer contained in this PC document. The data has been moved to a separate Virtual Hard Drive Document "Windows 2000 copy 1-011105 Disk1.vhdp".
On examining the above package I find:
BaseDrive.vhd 14.45GB (size about right) dated last night when I last closed VPC
MainPackageFile Alias
UndoDrive1.vud dated at the time of the problems.
On examining my "Windows 2000 copy 1-011105.vpc7 I find:
Configuration.plist
IconCache
MainPackageFile Alias
StartMenu.plist
Do you have a suggestion as to how I can rescue my above mentioned BaseDrive.vhd please? This is more recent than my last back-up.
Many thanks in advance.

Problem solved.

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