Ijust got a canon powershot A 4000IS for Christmas, and was looking at the instruction book and they said it would work on win7 when you use the disc. my computer is 1-2 months old and does not have a cd drive what am I supposed to do ?
Manuals and software are usually prepared well before release of a new model camera. So not surprising if your camera doesn't have Win8 driver. A lot of time the driver for an earlier PC OS, has cross compatibility with other versions. So first of try to install your driver from Win7 CD only pay attention to 32 or 64 bit compatibility of your system. If it fail, then check with Canon's support web page to see if the Win8 driver is already added. If so just download and you are done. If not that driver will be made available in no time so look again every now and then.