I know a guy below posted about corrupted files below but it didn't work and neither did anything in the games issues section. I have the same problem with all the larger game files I just bought and tried to download (The Longest Journey, Syberia, Psychonauts).

Basically I download the game using Firefox and choosing the "Download with browser" option. The files all complete without stopping, I even watched the whole download for The Longest Journey. The problem is that every time I go to install the game it does the intergrity check and says the files are corrupt, or if I skip by the integrity check it will always fail during the install.

I cleared out my internet cache, redownloaded the files, tried downloading it with Download Accelerator Plus, and it always has the same problems. I think I've downloaded the files about 5 times each now. The Longest Journey is the one I've tried the most and it has only one file, so that's not the problem with all the files being downloaded or being in the same folder. I've also ran the files as adminstrator and tried running in windows xp mode too. Seems like nothing will work, any suggestions?

My computer is very nice, its Windows 7 and 64 bit. If you need any more information let me know, thank you. (I just attached pics of the errors).

My old computer had a similar problem, and it ended up being a problem with my RAM. This caused ALL large downloads to fail most of the time (whether or not they were from GOG) and also caused decompressing large files to fail. For instance, I couldn't install Oblivion from my DVD version because there was an error while decompressing the large .cab files on the disc.

I certainly hope this isn't your problem. You can try testing it by checking if big downloads from other sites work, or installing a big game from discs. Another way to test it is to run Memtest or a similar program for testing your RAM. That takes a long time and is annoying, but if it comes up with errors then that's probably your problem. If you computer is new enough you may be able to get replacement RAM under warranty.

I know it sounds weird; I thought that bad RAM would cause my computer to crash a lot or otherwise be more obvious. But my old machine worked totally fine, except for large downloads and large file decompressions. I was even able to keep using the machine for a while after the problem occurred, playing smaller games. It was an old machine so I couldn't replace the RAM under warranty, so I just stuck to smaller games for a while and then eventually built a new machine.

Hopefully your problem is something that's easier to fix. My new machine is running Windows 7 64-bit and hasn't had any downloading or installing problems with anything, so I don't know what else could be causing your problem. Anyone else have ideas?

A couple other things to consider. First make sure your firewall or antivirus are not interfering with the download. Second if your on a wireless connection make sure the signal strengh stays strong throughout the download and you don't have anything running that could interfere with it.

Thank you for the response you two. I should've mentioned I am able to download larger files from other sites (I have plenty of games from direct2drive). I will see if I turn off every firewall/anti-virus I have if it will help. Unfortunately my neighbor has been downloading crap the past two days so I haven't been able to check it out. Maybe the internet was already having problems or something, I don't know. I did the ping check thing on the troubleshoot page and every once in awhile it looks like it stops. Not sure if that is because my neighbor or if it's always that way. I'm not sure why it wouldn't work still though considering I have tried downloading it with DAP.

As far as what you mentioned Waltorious, I don't think it's the computer. I have a brand new computer that runs literally everything. I think it has 6 gb of RAM. Only other thing I've thought of since the original post is that I do try to install all the games onto an external and it's getting a little lower on space. To get around this I did try to install on the C drive and it wouldn't work there either.

Thank you for responding again and being friendly. I'll keep you updated once my neighbor finally stops downloading crap or whatever he's doing that's causing the internet to be so slow the last two days.

If it looks like a duck, swims like a duck, and quacks like a duck, it probably is a duck. By the same logic, your downloads are almost certainly becoming corrupted in transport from GOG to your computer.

I've not personally tried this tool, so can't vouch for it. However stuff on SourceForge is usually pretty safe, and this looks like it's had a fair bit of use.

So what you could do is store all your download attempts as different file names, then use the tool here: http://sourceforge.net/projects/ccorr/ to merge the attempts together into what would hopefully be a valid installer

I just wanted to give some thanks for this answer. I downloaded this 3 times (twice by the downloader, once over plain http) and all three were corrupt. By comparing all three files in ccorr (as linked above) I was able to rebuild working versions of each of them, it's happily installing as I write this now :)

Glad to hear it helped. Thanks for giving some feedback on the tool too. I was wondering if anyone had used it successfully. Enjoy Psychonauts, it's a great game.

It works much better with 3 corrupt copies, as when you compare the files, if two match you can be sure that's the right part to keep, and reject the third. I'm loving the game so far, Tim Shafer (along with Ron Gilbert) is genius) :).