There's a more thorough thread on this at the gog galaxy subforum, but nothing that realy helps there either.

My patch installation has ben stuck at 88% for 3 hours now. Is this supposed to be some f-ing joke?

Yes, mine has been taking forever, I've been stuck at 89% for ~15 minutes or so. I guess I should have let it run while I ate dinner lol, I figured a ~600mb patch wouldn't take too long to apply. But hey, I guess it's worth it, I just hope all patches aren't like this.

It's "do you", not "are you" :)

the 500+ megabyte download was done before I noticed it was even doing a download.

But it's taking up my hard drive constantly doing the actual writing of all the cahnges.
This prevents playing any game that requires hard drive access after starting.... pretty much every modern game.

I had that too. Try restarting your computer then repair/verify, and make sure you at least have 60GB free.

With patches like this i think it's easier to uninstall the game and install it again.

Similar stuff happens with UE3-4 games on Steam very often - update just downloads changed files and then copies them to the game folder, replacing existing content. It's a really bad design IMO. Game engines should be designed that way it will be possible just to change some bytes in those container files. That's for example how xdelta works. So if 2Gb will needs to be changed patch files will be 100Mb to 2Gb depending on data type, not the whole 10-30Gb container file.

hit pause for a few seconds and resume if you have no disc activity. sometimes that works.
If there is activity wait.

Mine tells me it isn't compatible with version of game.

I read in another thread that it works the same.

Finally finished patching again for me and I had the presence of mind to turn off automatic updates now....

Game still crashes and takes the driver with it, requiring a full restart..... but at least now the crash reporter actually works when it hard crashes like this.

... oh and it's crashing sooner now; no hour long play for me anymore!
*facepalms*

Argh, should have launched without GoG.

Sarcastic tone and nonsensical sentence... someone with a massive ego who can't help but respond to someone's innocuous comment. Well done. loser.

It might be a lack of space.

After being stuck at 57% for several minutes, with Windows reporting my game SSD at 100% activity, I just deleted a few things going above 60GB of free space. The rest of the patching was done under a minute after that, no need to reboot Galaxy.

Almost there 92. Its like 2 hour wait honestly, should have made breakfast.

I had the same problem when installing the zero day patch. And now it's the same again. He makes a complete copy of the game. And then it delete. if this happens every patch, then the resource for rewriting the disk and my patience will not be enough.