Installing programs modify cabinet.dll?

[Techrat]

Is this normal, I was going to install this demo http://www.3dfahrschule.de (it's a 3D driving instructor), and Comodo said it was trying to modify or replace, windows\system32\cabinet.dll.

I thought that didn't seem very good and stopped it. It's the first time that I've noticed anything try this.

 

[gregmcc]

Does sound a bit suspect but its probably ok. They've probably just included the dll in their package and therefore are overwriting the one of disk. Make a copy of the original one, install the software and then do a MD5 sum comparing the two. Or just upload the new one to www.virustotal.com to be 99% sure.

 

[Techrat]

I already uploaded it to VT, still not sure if I trust it even though it came back negative.