I installed WR(AIO) 1.8 on my Windows 8 Pro x64 RTM (Technet version). I took a few disk images of my system/boot drive and figured, what the heck, let's do all the repairs. I checked the box to do a restart after WR completed it's work. During the repairs I noticed that some things were highlighted in red and I saw some fails, as in Fail:2. I didn't record any of the info on the screen because I knew logs were being created.
When WR was done and didn't seem like it would restart I did it myself (Maybe a mistake?). Windows 8 came up did a little dance, made a little love, than promptly hung. I then get a screen that tells me Windows encountered a problem and will try to fix it. Screen just kept staring me in the face, apparently hung. Tried rebooting and didn't even get into W8 at all.
Sure glad I made those disk images. Did a disk image restore and I'm back in business. Needless to say the WR logs were on the drive I just restored so I got nada, zip, zilch, bupkis to show you.
Is WR 100% compatible with W8 or did I just prove it isn't? I took the risk of doing everything, although if only tried to repair one thing it might have be the one that caused the problem or maybe it's a combination of repairs.
Take this report as you may. No finger pointing on my part. But as they say, 'Caveat Emptor'.