Vista - Can't Install Service Pack 2

When I try to install service pack 2 I get this message:

Installation was not successful

A system error prevented the service pack from installing. Please download and run the "Check for system update readiness" tool at Description of the System Update Readiness Tool for Windows Vista, for Windows Server 2008, and for Windows 7

If the "Check for system update readiness" tool doesn't fix the problem, visit the microsoft website for more information. (Details)

Error: TRUST_E_NOSIGNATURE(0x800b0100)

Note* I have ran the System Update Readiness Tool and still getting this error. Any help would be much appreciated.

Hi bar96080

Download Vista sp2 ISO, burn to cd.

1.Readiness Tool create CheckSur.log file in C:\Windows\Logs\CBS -please attache it

2.Run cmd.exe with administrative previlliges (right click on cmd.exe) as admin and type:

sfc /scannow

When it finish type in cmd.exe

findstr /c:"[SR]" %windir%\logs\cbs\cbs.log >%userprofile%\Desktop\sfcdetails.txt

on your desktop appear sfcdetails.txt

Attache to post sfcdetails.txt and CheckSur.log

Strongly suggest you reply to Flatvius's suggestions. You would do best trying to isolate and repair the underlying problem first.

From personal experience, I've found that if you download and force an SP2 installation, you run the risk of corrupting the Vista install.

Aoart from the excellent advice that Flavius posted, there 2 other things you can try:

1. Disconnect all devices except the mouse and keyboard
2. Do the installation in Safe Mode