Error log message & Service pack problems

I had dowloaded a xp hotfix which only partially installed (some time ago), I have just reloaded my XP disk over the the existing installation in a bid to fix up some missing registry files removed when using SPYBOT software (yes I played where I shouldn't have) Can anyone please tell me what this means & how to fix it if possible.
This was listed in my error log

Sunday, 18 April 2004 LoadPerf The performance counter name string value in the registry is incorrectly formatted. The bogus string is 2746, the bogus index value is the first DWORD in Data section while the last valid index values are the second and third DWORD in Data section.

I also got this message (See below) after trying to install the XP Service Pack (It down loaded ok, extracted ok but wouldn't update)
Setup could not verify the integrity of the file update .inf. Make sure the Cryptographic service is running on this computer. Many thanks in advance

 

Start the Administrative Tools utility in Control Panel.
Double-click Services. (this will open the services window)
Right-click Cryptographic Services, and then click Properties.
Click Automatic for Startup type, and then click Start.

You can now try to reinstall Windows XP Service Pack 1

 

No luck on that Pancake, I changed it, but no upgrade. I;m not sure if I got a bad Service pack file or maybe it's tied to the bogus sting file I mentioned.

Thanks anyway