I alreday own Witcher 3, and bought the GOTY because it came with the xpac/dlc's. I uninstalled my version of Witcher 3, and tried to install the GOTY edition, it just says updating for hours and hours i left it all night and nothing happend ive restarted and same problem it just says updating. How can i get this working?

I got it to stop saying updating by manually x'ing or closing the GOTY download and got the 1.32 update but now i cant click play.

What hardware do you have?

same boat for me but i was able to run the witcher3.exe so i can play but not through the gog launcher and i doubt anything in my rig would mess with it.

Operating System
Windows 10 Pro 64-bit
CPU
Intel Core i7 7700K @ 4.20GHz 61 °C
Kaby Lake 14nm Technology
RAM
64.0GB Dual-Channel Unknown @ 1066MHz (15-15-15-36)
Motherboard
Gigabyte Technology Co. Ltd. Z270X-Gaming 8 (U3E1) 38 °C
Graphics
NV Surround (5451x992@60Hz)
STD HDMI TV (1920x1080@60Hz)
4095MB NVIDIA GeForce GTX 1080 (Gigabyte) 39 °C
4095MB NVIDIA GeForce GTX 1080 (Gigabyte) 37 °C
ForceWare version: 419.17
SLI Enabled
Storage
476GB SanDisk SD8SN8U512G1122 (SATA (SSD)) 52 °C
1192GB Intel Raid 0 Volume (RAID )
5589GB Intel Raid 0 Volume (RAID )
465GB Western Digital WD Elements 10B8 USB Device (USB (SATA) ) 52 °C
Optical Drives
HL-DT-ST BD-RE WH16NS40
Audio
Sound Blaster ZxRi

I don't think it's a hardware issue. Try verifying game files in Galaxy. Probably some files got a little screwed up. Did you try launching the game from a desktop shortcut? There's also always a possibility to play the game without the client. You need to manually find the .exe file in the game folder however (unless you install the game from offline installers).

it took a while and a few restarts but it eventually ended up getting to the "Play" status. It was just an enormus pain in the arse. Or to quote someone a knife in my knickers.

If you experience these problems again, you should try downloading the offline installers. It might help.