[Creamo]

I got the same critical dialog box. Resolved the issue though by taking the following steps:

• Uninstalled Wowuides 1.0.300.2 (And in the process, discovered that the older 1.0.200.4f installation was still existant after the installation of 1.0.300.2)
• Uninstalled Wowuides 1.0.200.4f
• Downloaded and installed the Microsoft .NET Framework Version 1.0 Redistributable Package
• Downloaded and installed the Microsoft .NET Framework Version 1.1 Redistributable Package
• Downloaded and installed the Microsoft .NET Framework Version 2.0 Redistributable Package (x86)
• Searched, downloaded and installed all critical updates from Microsoft Update
• Installed Wowuides 1.0.300.2

Everything works perfectly now. As of current, only one error pops up in the message tab in wowuides:

• (X) attempt to index global `RaidFrame' (a nil value) | Blizzard_RaidUI.lua | Line 11 | Column 1 | Blizzard_RaidUI

This appears to be due to an incomplete reference to the new API changes in the WoW 1.0 patch, and can be completely disregarded for the time being until Nulkris finishes the next release with the completed WoW 1.0 compatible API database. Just a hunch, though. Anyhow, progress appears to be quite excellent. Can't wait to see the end product. Keep up the good work!