Yeah I thought that would be the case. Unfortunately, I couldn't find the iso image of Windows 7 that I had previously downloaded so now I'm on a pretty slow VPN connection downloading which still has an hour left.
In the meantime, i left the pc as it was and I got another error message.:
rollback.exe - bad image
D:\Sources\unbcl.dll is either not designed to run on windows or it contains an error. Try installing the program ysing the original installation media or contact your system administrator or the software vendor for support.
It's the CD.