I work in a company with about 350 people in IT,and about 3,000 PCs. We currently use VB 6.0, and have not taken any of the service releases for it. I would like to get us up to date by taking SP4. My fear is that with such a large environment, if we force this upgrade on everyone's PC, it will break some of the existing applications. Is anyone aware of any problems created when installing service packs 1 - 4? Is there any documentation on the Web that addresses this? Any information I can get would be greatly appreciated.