Copying a DLL changed its version?

[Bert Hyman]

Windows XP Pro SP3

Got a "hot fix" for a piece of commercial software which consisted of a
replacement for a DLL. For the sake of discussion, let's call it
"that.dll."

The properties of the original showed a version of 10.0.0.14 and a
"Digital Signature" date of March 14, 2011. The properties of the new
one showed a version of 10.0.0.15 and a Digital Signature date of July
5, 2011.

With nobody using the DLL, I changed the name of the original to
"that.dll.old", then copied the new one into the application's
directory.

Checking the properties, it now had a version of 10.0.0.14, but the
Digital Signature date was still July 5.

I repeated the process a couple of times to be sure I wasn't
accidentally copying things in the wrong direction, but the results were
always the same. The new DLL in its download directory still showed the
correct version of 10.0.0.15.

What could explain this apparent change of versions?

 

[Unk]

Windows XP Pro SP3

Got a "hot fix" for a piece of commercial software which consisted of a
replacement for a DLL. For the sake of discussion, let's call it
"that.dll."

The properties of the original showed a version of 10.0.0.14 and a
"Digital Signature" date of March 14, 2011. The properties of the new
one showed a version of 10.0.0.15 and a Digital Signature date of July
5, 2011.

With nobody using the DLL, I changed the name of the original to
"that.dll.old", then copied the new one into the application's
directory.

Checking the properties, it now had a version of 10.0.0.14, but the
Digital Signature date was still July 5.

I repeated the process a couple of times to be sure I wasn't
accidentally copying things in the wrong direction, but the results were
always the same. The new DLL in its download directory still showed the
correct version of 10.0.0.15.

What could explain this apparent change of versions?

The original probably has a copy in the C:\WINDOWS\system32\dllcache folder.
When Windows detects that the file has changed, it replaces it from the dllcache folder.

Google Hiren's BootCD, burn it and boot to Mini Windows. Replace the one in the dllcache folder
with the new one.

Unk

 

[Bert Hyman]

The original probably has a copy in the C:\WINDOWS\system32\dllcache
folder. When Windows detects that the file has changed, it replaces it
from the dllcache folder.

Never occurred to me that a third-party DLL would end up in the dll
cache; I'd assumed it was Windows' personal property.

Thanks.

 

[Unk]

Never occurred to me that a third-party DLL would end up in the dll
cache; I'd assumed it was Windows' personal property.

Thanks.

You're welcome.