Trouble installing Win 7 SP1

I'm trying to install Win7 SP1, and am unable to. Here is the contents of my Checksur.log file:

=================================
Checking System Update Readiness.
Binary Version 6.1.7601.21645
Package Version 15.0
2012-07-30 11:45

Checking Windows Servicing Packages

Checking Package Manifests and Catalogs
(f) CBS MUM Corrupt 0x800F0900 servicing\Packages\Microsoft-Windows-VirtualPC-Package~31bf3856ad364e35~amd64~zh-TW~7.1.7601.17514.mum Line 1:
(f) CBS Catalog Corrupt 0x800B0100 servicing\Packages\Microsoft-Windows-VirtualPC-Package~31bf3856ad364e35~amd64~zh-TW~7.1.7601.17514.cat

Checking Package Watchlist

Checking Component Watchlist

Checking Packages

Checking Component Store

Summary:
Seconds executed: 1129
Found 2 errors
CBS MUM Corrupt Total count: 1
CBS Catalog Corrupt Total count: 1

Unavailable repair files:
servicing\packages\Microsoft-Windows-VirtualPC-Package~31bf3856ad364e35~amd64~zh-TW~7.1.7601.17514.mum
servicing\packages\Microsoft-Windows-VirtualPC-Package~31bf3856ad364e35~amd64~zh-TW~7.1.7601.17514.mum
servicing\packages\Microsoft-Windows-VirtualPC-Package~31bf3856ad364e35~amd64~zh-TW~7.1.7601.17514.cat
servicing\packages\Microsoft-Windows-VirtualPC-Package~31bf3856ad364e35~amd64~zh-TW~7.1.7601.17514.cat

Thank you in advance for your help!

I don't have a VirtualPC package on my system,. Could you describe how you are installing Windows 7 SP1 and some details about your system, such as, are you running a Virtual OS version of some type?

I confess that I sent that log without really looking at it, but this isn't a VM, and to my knowledge, I don't have vmWare (or any other virtual software) installed.

I downloaded SP1 to my hard drive, and am trying to install from there.


Mike

Another odd thing, when I run SYSTEMINFO, it shows "n/a" for Hotfixes, but my Windows Update history screen shows plenty of updates.