Interresting update. I tested a more complete ISO which also failed (I stopped it after at least 4 hours blocked at T-13). This one integrates all the same hotfixes, a dozen of addons like .net 1.1 and 2 or directX, and I removed all I don't need. All this was done with 1.3.0.4. Looking at the svcpack.inf I found an incredible amount of duplicates. One hotfixe was listed 2045 times, another 1024 times, others 512, 256, 128, 64, 32, 16, 8, 4 and 2 times each. The total of ducplicates is huge!! I removed all the duplicates and recreated the ISO. Well it installed like a charme under Virtual PC 2007. It stayed around 10 minutes at T-13 and moved on normally. All my addons seem to be present, so everything is fine. So Nuhi, can you please look why this version creates so many duplicates? For me it is confirmed to be a real and big issue.