First i downloaded the files using GOG Downloader. At some point, repeated errors occur:

1] Wow! There was an error writing to your downloads folder [1008]
2] Whoops: There was an error requesting the file! All transfers stopped, sry :( [1014]

After multiple tries and the repeated errors, i end GOG Downloader through Task Manager. Afterwards, i use IDM to download the game files one by one. Here's what i got:

1]setup_baldurs_gate_2.exe
2]setup_baldurs_gate_2-1.bin
3] A file named 2 with the type listed as FILE. i renamed the file to 2.bin

Everytime i launch the EXE, an integrity check follows. When finished, it identifies file no. 1 & 2 as CORRUPTED. This happens before and after i rename the 3rd file. Btw, i'm on Windows Vista SP2.

Can anybody provide some solution to this. I've read the support files that says to disable UAC, but the UAC never interferes at all, a dialogue box just says that file no 1 & 2 are corrupted after the integrity check.

UPDATE: Problem solved. Renaming the files to baldurs_gate_complete, baldurs_gate_complete-1 and baldurs_gate_complete-2, is the solution. If anybody have the same problem, rename the files.